Steel: CrV50Bv30 45-47 HRC Chromium plating D1: 15 mm D2: 22 mm Length: 38 mm "Delo Tekhniki" torx socket wrenches are made of chrome-vanadium steel using cold stamping and subsequent heat treatment. The sockets are hardened and protected against corrosion by chromium plating. They can withstand high and prolonged loads. Torx is a six-point profile in which the direction of force is distributed perpendicular to the surface of the contact points, allowing their area to quickly increase with increasing load and virtually eliminating edge damage. A special rifled pattern on the socket base improves grip and prevents slipping in the hands. You can also purchase a set of TORX socket wrenches.