Socket 3/8 Inch Sq Dr 21mm Hexagon Profile (6 Point) Britool Hallmark Mhm21

This range of sockets are from the Britool Hallmark range and are manufactured from the highest quality alloy steel.
Each socket has 6 sided hexagon profile and a ball retaining groove in each face of the square drive. This ensures a positive fit with all 3/8 inch accessories.
These sockets feature Britool's stress relief drive system which reduces fastener damage and increases the maximum torque loads which can be applied.
NB: Picture is generic and is used to illustrate item. It may be of a different size.