Britool Hallmark 3/8" Semi Deep 6 Point Metric Socket Range 6-15mm MSH

The Britool Hallmark 3/8" Drive Semi-Deep Metric Socket Range provides a practical solution when a standard socket is too short but a full deep socket is unnecessary or creates access problems.

Available individually in metric sizes from 6mm to 15mm, these professional hand sockets combine additional reach with a compact semi-deep profile, making them particularly useful for automotive servicing, mechanical repairs, engineering and general workshop applications.

Each socket features a precision 6-point hexagon profile, providing secure engagement with compatible nuts and bolt heads. The six-sided design helps provide positive torque transfer while reducing the likelihood of fastener rounding when the correct size socket is used.

Finished in a high-polish mirror chrome, the sockets offer a professional appearance, corrosion resistance and an easy-to-clean surface suitable for regular workshop use.

Individual sizes can be purchased separately, or the complete 6-15mm range is available as the MSHSET10 10-Piece Semi-Deep Socket Set.

Key Features

• Genuine Britool Hallmark professional hand sockets
• 3/8" square drive
• Semi-deep / intermediate-depth profile
• Metric sizes from 6mm to 15mm
• 6-point / hexagon socket profile
• Positive engagement with compatible hexagonal fasteners
• Additional reach compared with standard-depth sockets
• More compact than conventional deep sockets
• High-polish mirror chrome finish
• Suitable for professional automotive and engineering applications
• Ideal for garage and workshop maintenance
• Individual sockets available separately
• Complete 10-piece range available as MSHSET10
• Britool Hallmark identification

Sizes Available

The Britool Hallmark semi-deep socket range is available in:

6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm and 15mm

Drive: 3/8" Square Drive
Profile: 6-Point / Hexagon
Type: Semi-Deep Metric Hand Socket
Finish: High-Polish Mirror Chrome
Size Range: 6-15mm

Please select the required socket size carefully when ordering.

Semi-Deep Socket Design

A semi-deep socket bridges the gap between conventional standard and deep socket profiles.

The additional length provides improved access to recessed fasteners and nuts positioned further along studs, while retaining a more compact profile than a full deep socket.

This makes the range particularly useful in vehicle engine bays and mechanical assemblies where available working space can prevent the use of a conventional deep socket.

For professional mechanics, semi-deep sockets provide a useful additional option alongside standard and deep socket collections.

Socket Lengths

Overall socket length varies according to size.

10mm, 11mm, 12mm and 13mm: approximately 44mm long

14mm and 15mm: approximately 47mm long

These dimensions demonstrate the intermediate-length design of the range, providing additional reach without the overall length of a conventional deep socket.

6-Point Hexagon Profile

Each socket features a 6-point hexagon profile designed to provide positive engagement with compatible six-sided fasteners.

The profile helps provide secure contact and efficient torque transfer, making these sockets suitable for regular professional hand-tool applications.

Correct socket sizing should always be used to ensure proper fastener engagement and minimise the risk of damage.

Professional Automotive & Workshop Applications

The 6-15mm metric range covers numerous smaller fasteners commonly encountered during automotive and mechanical servicing.

Typical applications include:

• Automotive servicing
• Engine bay repairs
• Vehicle maintenance
• Mechanical engineering
• Machinery servicing
• Professional garages
• Automotive workshops
• Assembly and maintenance work
• General engineering
• Home garage and enthusiast use

The semi-deep profile is particularly useful for fasteners where additional clearance over a protruding thread or stud is required.

High-Polish Chrome Finish

The sockets feature a high-polish mirror chrome finish, providing a smooth professional surface that helps resist corrosion and makes workshop cleaning straightforward.

Each socket also carries Britool Hallmark identification, making the range easy to recognise within a professional socket collection.

Complete MSHSET10 Set Available

For mechanics and workshops requiring every size, the complete range is also available as:

MSHSET10 – Britool Hallmark 10-Piece 3/8" Drive Semi-Deep 6-Point Socket Set

The set contains:

6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm and 15mm

Individual sockets remain available separately, allowing a lost or damaged socket to be replaced without purchasing another complete set.

Important Information

• This listing covers individual sockets in the selected size.
• Available sizes: 6mm to 15mm.
• 3/8" square drive.
• Semi-deep / intermediate-depth profile.
• 6-point hexagon design.
• High-polish mirror chrome finish.
• Complete 10-piece set available as MSHSET10.
• Individual replacement sockets are available separately.
• These are professional hand sockets, not impact sockets.
• Product photograph is generic and may show a different socket size.
• You will receive the size selected when ordering.

The Britool Hallmark Range

The Britool Hallmark range was developed by Britool in the 1980s for the automotive aftermarket and has been a long-established choice for professional workshop users.

Each spanner carries distinctive Britool Hallmark and "The Marque of Skill" branding,  providing clear identification and reflecting the professional tooling heritage of the range.

The Britool Hallmark guarantee covers defects in materials and/or workmanship when tools are used for the purpose for which they were designed and for their expected service life.

The guarantee does not extend to fair wear and tear, moving parts such as ratchet mechanisms, or consumable items such as bits and repair kits.