Britool Hallmark 3/8"SD Whitworth Bi-Hexagon Sockets - Made in England

These Britool Hallmark Whitworth sockets are a rare professional-grade range, manufactured from premium alloy steel in the original Britool UK facility in Cannock before its closure.

 Designed for durability and high torque applications, each socket features a ball retaining groove on every face of the square drive, ensuring a secure fit with all 3/8" accessories. The Bi-Hexagon (12-point) Stress Relief Drive allows higher torque loads while reducing the risk of fastener damage, making these sockets ideal for demanding mechanical and workshop tasks.  Only suitable for hand use.

Stock is extremely limited, with only two sizes currently available. Please note that the image is generic and used for illustration purposes; the size you receive will match your order.

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.