Britool Hallmark V3 3/8 Drive 12 Point Impact Socket Range 6-24mm Bi-Hex Cr-Mo
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The Britool Hallmark V3 3/8" Drive 12 Point Impact Socket Range offers professional-quality standard-depth metric impact sockets designed for automotive servicing, mechanical engineering and demanding workshop applications.
Manufactured from heat-treated Chromium-Molybdenum (Cr-Mo) steel, these sockets are engineered to withstand the repeated shock loading associated with pneumatic impact wrenches, cordless impact tools and other suitable powered fastening equipment.
Each socket features a 12-point bi-hexagon profile incorporating Britool's Stress Relief Drive system, designed to improve torque transfer while reducing concentrated loading on compatible fasteners.
Available individually in 19 metric sizes from 6mm to 24mm, the range provides a comprehensive selection for professional mechanics, maintenance engineers and workshop technicians.
The sockets feature a 3/8" square drive, a ball-retaining groove and a cross-drilled side hole for use with compatible pin-and-ring retention systems where required.
Each socket is laser marked with the Britool Hallmark logo and individual part number, providing clear identification and making it easier to source replacement sizes.
Important: These are the V3 versions of the Britool Hallmark impact sockets. Customers matching an existing socket collection should confirm the required version before ordering.
This listing is for individual sockets in the selected metric size, not the complete 19-piece set.
Key Features
- Genuine Britool Hallmark V3 impact sockets
- Professional 3/8" square drive
- 12-point bi-hexagon profile
- Standard-depth socket design
- Available in 19 metric sizes from 6mm to 24mm
- Manufactured from Chromium-Molybdenum (Cr-Mo) steel
- Heat-treated construction
- Designed for professional impact tool applications
- Suitable for compatible pneumatic impact wrenches
- Suitable for compatible cordless and electric impact wrenches
- Britool Stress Relief Drive system
- Designed to improve torque transfer and reduce fastener damage
- Ball-retaining groove for compatible square-drive accessories
- Cross-drilled side hole for compatible pin-and-ring retention systems
- Laser-marked Britool Hallmark logo
- Individual socket part number marking
- V3 version identification
- Individual replacement sizes available
- Complete 19-piece standard-depth set available separately
- Corresponding deep impact sockets available separately
- Suitable for automotive, engineering and industrial maintenance
Available Metric Socket Sizes
The Britool Hallmark V3 3/8" Drive Standard-Depth 12 Point Impact Socket Range includes the following individual sizes:
- 6mm
- 7mm
- 8mm
- 9mm
- 10mm
- 11mm
- 12mm
- 13mm
- 14mm
- 15mm
- 16mm
- 17mm
- 18mm
- 19mm
- 20mm
- 21mm
- 22mm
- 23mm
- 24mm
All sockets feature a 3/8" square drive, 12-point bi-hexagon profile and standard-depth design.
Please select the required metric size from the available product options.
The size selected determines the individual socket supplied.
V3 Version – Important Compatibility Information
These sockets are specifically the Britool Hallmark V3 version.
Britool Hallmark socket ranges have been produced in different versions and designs, and customers replacing a socket from an existing collection may wish to match the original version.
The V3 designation is particularly relevant when maintaining a matching set or replacing an individual socket in an existing tool control tray.
Please confirm that the V3 version is the correct one for your requirements before ordering.
If you are unsure which version you need to match an existing Britool Hallmark range, please contact us before purchasing.
The 3/8" square drive dimension identifies the drive connection, but it does not establish that different socket versions will have identical external dimensions, styling or part references.
Chromium-Molybdenum Steel Construction
The Britool Hallmark V3 impact sockets are manufactured from Chromium-Molybdenum steel, commonly referred to as Cr-Mo.
Cr-Mo steel is widely used in professional impact socket manufacturing because of its toughness and suitability for repeated mechanical shock loading.
Unlike conventional chrome hand sockets, impact sockets must withstand the rapid torque pulses produced by impact wrenches.
The heat-treated Cr-Mo construction is intended to provide the strength and durability required for demanding professional fastening applications.
This makes the range suitable for workshops using compatible pneumatic and powered impact tools.
Always ensure that the selected socket, impact wrench and any connecting accessories are appropriately rated for the intended application.
Britool Stress Relief Drive System
Each socket incorporates Britool's Stress Relief Drive system.
This drive profile is designed to improve contact with compatible fasteners and distribute torque more effectively.
Rather than concentrating the applied force exclusively at the corners of a hexagonal fastener, the drive design is intended to improve engagement and reduce localised stress.
Potential benefits include:
- Improved torque transfer
- Reduced concentrated loading on fastener corners
- More secure engagement with correctly sized fasteners
- Reduced risk of fastener rounding when used correctly
- Improved performance during demanding workshop applications
The effectiveness of any socket depends on the condition of the fastener, correct size selection and appropriate tool use.
Severely rounded, corroded or damaged fasteners may require specialist extraction equipment.
12-Point Bi-Hexagon Profile
The 12-point bi-hexagon profile provides twelve engagement positions around a compatible fastener.
This offers more positioning options than a conventional 6-point socket and can make it easier to align the socket where surrounding components restrict access.
The bi-hexagon design is suitable for correctly sized compatible hexagonal and 12-point fasteners.
It is particularly useful in mechanical applications where a 12-point fastener head is fitted.
The combination of the 12-point profile and Stress Relief Drive geometry is designed to provide effective engagement and dependable torque transfer.
For heavily damaged or rounded conventional hexagonal fasteners, a suitable 6-point impact socket or specialist extraction tool may be preferable.
3/8" Square Drive – Professional Impact Tool Compatibility
All sockets in the range feature a 3/8" square drive.
This drive size is commonly used in automotive workshops and mechanical maintenance applications where a compact impact socket is required.
Suitable tools include:
- 3/8" drive pneumatic impact wrenches
- 3/8" drive cordless impact wrenches
- 3/8" drive electric impact wrenches
- Compatible manually operated 3/8" drive tools
The socket must be correctly matched to the drive size and the intended fastener.
Where a powered impact tool is used, all connected accessories must be suitable for impact applications.
Ball-Retaining Groove
Each socket features a ball-retaining groove designed to work with compatible 3/8" square-drive accessories.
The groove allows a suitable spring-loaded retaining ball on the drive tool to engage with the socket.
This helps retain the socket on compatible ratchets, extensions and drive accessories.
The effectiveness of ball retention depends on the condition and design of the connecting tool.
Where the equipment manufacturer specifies a positive pin-and-ring retention system, the correct retaining components should be used.
Cross-Drilled Hole for Pin-and-Ring Retention
The Britool Hallmark V3 impact sockets also feature a cross-drilled side hole.
This allows the socket to be used with compatible pin-and-ring retention arrangements where required.
Positive socket retention can be particularly important during impact wrench operation.
The correct retention system should always be selected according to the impact wrench manufacturer's instructions.
Retaining pins and rings are not specified as included with these individual sockets.
Do not assume that a ball-retaining groove alone provides the required retention for every impact tool or application.
Standard-Depth Socket Design
These are standard-depth impact sockets.
The standard-depth profile provides a compact alternative to a deep impact socket where additional reach is unnecessary.
This can be particularly useful when working in confined engine compartments, around mechanical assemblies or in areas where a longer socket would restrict access.
Standard-depth sockets are commonly used for general automotive fastening tasks involving accessible nuts and bolt heads.
For applications involving protruding threaded studs or recessed fasteners, a deep socket may be more appropriate.
A corresponding Britool Hallmark deep 12-point impact socket range is available separately.
Laser-Marked Britool Hallmark Identification
Each socket is laser marked with the Britool Hallmark logo and individual part number.
These markings provide convenient identification in professional workshop environments.
The individual part number is particularly useful when ordering a replacement socket to match an existing collection.
For customers maintaining a complete set, confirming the socket's size, profile, drive and V3 version helps ensure that the correct replacement is selected.
Individual Sockets or Complete 19-Piece Set
This listing is for individual Britool Hallmark V3 3/8" Drive 12 Point Standard-Depth Impact Sockets.
Customers can select the specific size required rather than purchasing a complete set.
For workshops requiring the full size range, a corresponding 19-piece standard-depth 12-point impact socket set is available separately.
Set reference: MBMPSET19
The full set covers the 19 metric sizes from 6mm through 24mm.
Individual sockets are useful for replacing missing or damaged tools or adding extra quantities of frequently used sizes.
The complete 19-piece set is not included in this individual socket listing.
Matching Deep 12-Point Impact Socket Range
For applications requiring additional socket reach, Britool Hallmark also offers corresponding 3/8" Drive Deep 12 Point Bi-Hexagon Impact Sockets.
The deep-profile range is available in individual sizes and as a complete 19-piece set.
Deep 19-piece set reference: MDBMPSET19
Deep impact sockets can be useful where a threaded stud protrudes beyond the fastener or where additional reach is required.
The deep socket range is sold separately.
Combined Standard and Deep Impact Socket Set
A larger 32-piece Britool Hallmark 3/8" Drive 12 Point Impact Socket Set is also available.
Set reference: MSDPBSET32
This alternative set combines standard-depth and deep-depth impact sockets, providing a wider selection of socket configurations for professional workshop use.
It may be a suitable option for customers building a more comprehensive 3/8" drive impact socket collection.
The MSDPBSET32 set is sold separately.
Professional Automotive and Engineering Applications
The Britool Hallmark V3 3/8" Drive 12 Point Impact Socket Range is suitable for:
- Professional automotive servicing
- Engine maintenance and repairs
- Gearbox and transmission work
- Suspension and chassis servicing
- Commercial vehicle maintenance
- Mechanical engineering
- Industrial machinery servicing
- Agricultural machinery maintenance
- Plant equipment maintenance
- Fleet maintenance workshops
- Pneumatic impact wrench applications
- Cordless impact wrench applications
- General professional mechanical fastening
- Workshop socket replacement and tool control
Always use the correct socket size and profile for the fastener and follow the equipment manufacturer's operating instructions.
Technical Specifications
- Brand: Britool Hallmark
- Product version: V3
- Product type: Metric Impact Socket
- Drive size: 3/8" square drive
- Socket profile: 12 Point Bi-Hexagon
- Socket depth: Standard
- Measurement system: Metric
- Material: Chromium-Molybdenum Steel (Cr-Mo)
- Construction: Heat Treated
- Impact rated: Yes
- Drive profile technology: Britool Stress Relief Drive
- Available sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 and 24mm
- Number of available sizes: 19
- Smallest socket size: 6mm
- Largest socket size: 24mm
- Drive retention feature: Ball-retaining groove
- Additional retention feature: Cross-drilled side hole
- Pin-and-ring compatibility: For suitable retention systems
- Socket markings: Laser-marked Britool Hallmark logo and individual part number
- Suitable for pneumatic impact tools: Yes, with compatible equipment
- Suitable for cordless impact tools: Yes, with compatible equipment
- Individual sizes: Available separately
- Standard-depth 19-piece set: MBMPSET19
- Deep 12-point 19-piece set: MDBMPSET19
- Combined standard and deep 32-piece set: MSDPBSET32
- Primary applications: Automotive, engineering and industrial impact fastening
About Britool Hallmark
Britool has a long history in professional hand tool manufacturing, dating back to 1908.
During the 1980s, Britool developed the Hallmark range for the professional automotive aftermarket.
The Hallmark range was established to provide workshop users with professional tools carrying a distinctive identification mark.
Britool Hallmark tools are recognised by their branding and hallmark logo,
reflecting the range's association with professional automotive and mechanical tooling.
The product range includes sockets, ratchets, spanners, screwdrivers, impact tools and specialist workshop equipment.
These V3 3/8" Drive 12 Point Impact Sockets combine professional Cr-Mo construction with Britool's Stress Relief Drive system and practical retention features for demanding workshop use.
Britool Hallmark Guarantee
The Britool Hallmark guarantee covers qualifying defects in materials and workmanship when tools are used for their intended purpose and within their expected usable life.
Where a qualifying manufacturing or material defect is identified, repair or replacement may be provided in accordance with the applicable guarantee terms and conditions.
The guarantee does not generally cover:
- Fair wear and tear
- Misuse or incorrect application
- Damage caused by excessive force or overloading
- Use with incompatible tools or accessories
- Moving parts subject to normal wear
- Consumable items
- Replacement bits
- Repair kits and excluded maintenance components
Impact sockets should be inspected regularly for damage and used only with appropriately rated equipment.
Full Britool Hallmark guarantee terms and conditions apply.
Important Information
- Genuine Britool Hallmark V3 Impact Sockets
- 3/8" square drive
- 12-point bi-hexagon profile
- Standard-depth design
- Heat-treated Cr-Mo steel
- Impact rated
- Britool Stress Relief Drive
- Available in individual sizes 6mm to 24mm
- Please select the required size before ordering
- V3 version – check compatibility when matching existing sockets
- Ball-retaining groove
- Cross-drilled hole for compatible pin-and-ring retention
- Laser-marked Britool Hallmark logo and part number
- Complete MBMPSET19 19-piece standard-depth set available separately
- Corresponding MDBMPSET19 19-piece deep set available separately
- Combined MSDPBSET32 32-piece standard and deep set available separately
- Product photographs may show a different socket size for illustration purposes
- The socket supplied will be the metric size selected when ordering
- Check the required socket size and V3 version carefully
- Ensure the socket is fully engaged with the fastener
- Use the correct retention arrangement for the impact tool
- Do not use cracked, excessively worn or damaged sockets
- Follow the impact wrench manufacturer's operating and safety instructions
- This listing is for one individual Britool Hallmark V3 3/8" Drive Standard-Depth 12 Point Bi-Hexagon Impact Socket in the selected metric size.
Weight & Dimensions
Weight & Dimensions
