The Britool metric short hex keys are made in chrome vanadium steel for torque strength exceeding current standards with a zinc-plated finish. The angles on the end faces are microchamfered for better grip in the screw head.
ISO 2936 - DIN 911.
The Britool BRIE120102B Short Arm Hexagon Key 3.5mm has the following dimensions:
Arm Length: 70mm
L Length: 26mm
Weight: 7g