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

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.