3/8"SD Bi-Hexagon / 12 Point Profile Impact Socket Range Britool Hallmark (V3)

The Britool Hallmark 3/8" drive standard depth impact socket range is engineered for professional workshop use, delivering strength, precision, and durability in high-torque applications. Designed for use with air and power tools, these sockets are manufactured from premium chromium molybdenum (Cr-Mo) steel and heat treated to ensure long-lasting performance under demanding conditions.

Each socket incorporates Britool’s Stress Relief Drive system, allowing higher torque to be applied while reducing wear and damage to fasteners. The 12-point bi-hexagon profile provides secure engagement, helping to prevent rounding and improve overall efficiency.

For reliable tool connection, every socket features a ball retaining groove, ensuring a positive fit with all 3/8" square drive accessories. A cross-drilled side hole is also included for use with pin-and-ring retention systems when additional security is required.

All sockets are laser marked with the Britool Hallmark logo and part number for clear identification and workshop traceability. The range includes sizes from 6mm to 24mm, covering 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, and 24mm, making it suitable for a wide variety of fastening tasks.

Sockets are available individually for replacement as required and can also be purchased as part of a full 19-piece set (MBMPSET19).

Corresponding sizes available indiviually in a deep depth if required or available as a 19 piece deep 12 point set set in a tool control foam - MDBMPSET19

Image used may be of a different size but is only used to show overall look and design of socket.  You will receive the size as per your order, so please choose carefully.

PLEASE NOTE THAT THIS IS THE V3 VERSION OF THIS SOCKET IF UNSURE WHICH VERSION YOU NEED TO MATCH YOUR RANGE PLEASE CONTACT US. THANKS

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.