The 05021610001 Wrench; Hex-Plus hexagon key from Wera is designed to fit into standard HEX 2.5mm screws and bolts. Featuring a Wera Hex-Plus hexagon head with long, ergonomic grip allowing for greater torque, the overall length of this key is 112mm. The hardened chrome molybdenum steel construction ensures a secure fit and durability over time.