The hexagon long armed keys are six-sided with fully hardened chrome vanadium wrenches for driving socket screws. They are frequently used on machinery when securely fastening parts together and can also be used on domestic appliances and cycles.

Faithfull keys from 4mm (5/32in) upwards have chamfered edges to prevent damage to fittings and keys from 3mm (1/8in) upwards are marked with their size.

The Faithfull FAIHK140MLA long arm hexagon key has the following specifications:
Size: 14.0mm.
Length: 230mm.
Type: Long arm.