Britool Hallmark

Britool Hallmark 10 Piece 1/2" Drive XZN Spline Impact Bit Socket Set M4-M20

  • Britool Hallmark 10 piece XZN impact bit sockets M4 to M20 supplied in tool control EVA storage foam.
  • Set of 10 1/2" drive spline impact socket drivers from M4 to M20 from Britool Hallmark.
  • Britool Hallmark LMSPSET10 Spline Impact bit socket set, showing close up image of spline sockets in the storage foam tray.
  • A 10 piece set of black spline xzn impact driver bits from M4-M20 arranged neatly in a red foam tray, from the Britool Hallmark range.
  • 1/2" drive XZN Spline Impact bit socket driver sizes M4 and M20 from Britool Hallmark.
  • Britool Hallmark LMSPSET10 spline impact socket set shown in its outer packaging box.
  • Icon with '1/2" Drive' text on a black background
  • Britool Hallmark offical "B" Marque of Skill logo.
  • Britool Hallmark Official brand logo
Save £19.67

LMSPSET10

£53.99
£53.99 £73.66
VAT included. Shipping calculated at checkout.

The Britool Hallmark 10-Piece 1/2" Drive XZN Spline Impact Bit Socket Set is a professional-grade solution for working with 12-point XZN (triple square) spline fasteners commonly found in automotive, industrial, and engineering applications. Designed to withstand the high torque generated by impact tools, this set delivers outstanding strength, precision, and durability.

Manufactured from premium Chrome Molybdenum steel (Cr-Mo), each impact bit socket is engineered to resist shock loads and repeated heavy-duty use. The precision-machined XZN profile provides accurate engagement with fasteners, helping to minimise cam-out and reduce the risk of rounding or damaging spline heads.

Each bit measures approximately 60mm in overall length, providing excellent reach into recessed fixing points while maintaining maximum strength and control. Every socket is laser marked with the Britool Hallmark logo and individual part number for quick identification in busy workshop environments.

Supplied as a comprehensive 10-piece set, it covers spline sizes M4 through to M20, making it an essential addition to any professional mechanic's or engineer's toolkit.

Key Features
  • Genuine Britool Hallmark quality
  • Professional 10-piece XZN spline impact bit socket set
  • 1/2" square drive
  • Precision-machined 12-point XZN (triple square) profile
  • Manufactured from premium Chrome Molybdenum (Cr-Mo) steel
  • Designed for high-torque impact applications
  • Laser marked with Hallmark branding and part numbers
  • Suitable for impact wrenches, cordless impact drivers, and pneumatic tools
  • Ideal for automotive, industrial, and engineering applications
Set Contents

The set includes the following XZN spline sizes:

  • M4
  • M5
  • M6
  • M8
  • M10
  • M12
  • M14
  • M16
  • M18
  • M20

Bit Length: Approx. 60mm each

Specifications
  • Brand: Britool Hallmark
  • Model: LMSPSET10
  • Drive Size: 1/2" Square Drive
  • Bit Profile: XZN (Triple Square / 12-Point Spline)
  • Sizes: M4–M20
  • Bit Length: Approx. 60mm
  • Material: Chrome Molybdenum Steel (Cr-Mo)
  • Finish: Black Impact Finish
  • Suitable for: Impact and Hand Tool Use
Designed for High-Torque Applications

The Chrome Molybdenum construction and precision-machined XZN profile ensure maximum strength and reliable engagement when working with stubborn or high-torque fasteners. These sockets are built to withstand repeated use with:

  • Impact wrenches
  • Cordless impact drivers
  • Pneumatic tools
  • High-torque hand tools
Ideal Applications

Suitable for:

  • Automotive servicing and repairs
  • Transmission work
  • Drivetrain maintenance
  • Cylinder head and engine repairs
  • Industrial maintenance
  • Engineering workshops
  • Plant and agricultural machinery
  • Professional mechanics and technicians
Professional Britool Hallmark Quality

Engineered for demanding workshop environments, the Britool Hallmark 10-Piece 1/2" Drive XZN Spline Impact Bit Socket Set combines premium Chrome Molybdenum construction, precision-machined spline profiles, and professional durability to deliver reliable performance for even the toughest fastening applications.

The Brand

The HALLMARK range was developed by Britool in the 80's for the automotive aftermarket. it has been the professional’s choice ever since. Each tool is marked with the Britool hallmark , your guarantee of quality.

The Britool Hallmark guarantee covers against defective materials and/or workmanship when used for the purpose for which they were designed and for the expected life of the tool. In the unlikely event that a product fails during normal use, it will be repaired or replaced. The guarantee does not extend to fair wear & tear, moving parts such as ratchet mechanisms or consumable items such as bits and repair kits.
Britool Hallmark 10 Piece 1/2" Drive XZN Spline Impact Bit Socket Set M4-M20

£53.99

Frequently Asked Questions

What sizes are included in the Britool Hallmark LMSPSET10 XZN socket set?
The set contains 10 XZN spline impact bit sockets in M4, M5, M6, M8, M10, M12, M14, M16, M18 and M20. This broad M4–M20 range provides useful coverage for professional automotive, engineering, industrial and machinery applications.
What are XZN, triple square and 12-point spline bits?
XZN, commonly referred to as triple square or 12-point spline, is a specialist fastener profile used extensively in automotive and mechanical applications. The precision-machined profile is designed to engage correctly with matching XZN fasteners and should not be confused with Torx, Ribe or conventional hex profiles.
Are these XZN bit sockets suitable for impact wrenches?
Yes. The LMSPSET10 is specifically designed as an impact-rated XZN bit socket set and can be used with suitable 1/2" drive impact equipment, including pneumatic and cordless impact tools. They can also be used with compatible 1/2" drive hand tools where appropriate.
What automotive jobs are XZN spline sockets commonly used for?
XZN fasteners can be encountered during transmission, drivetrain, engine and other automotive repair work, although the exact profile and size required varies by vehicle and component. The set is also suitable for compatible fasteners found in industrial equipment, machinery and engineering applications.
Why is it important to use the correct XZN size on a spline fastener?
Correct sizing helps ensure the bit engages properly across the fastener's spline profile, improving torque transfer and reducing the risk of slipping, cam-out or damaging the fastener head. The bit should always be fully seated before applying significant torque or using an impact tool.
How long are the XZN impact bit sockets?
Each bit socket measures approximately 60mm in overall length. This provides useful reach for recessed spline fasteners while maintaining a practical size for professional automotive and mechanical workshop use.