This 1/4" hex impact magnetic bit holder is manufactured from chrome vanadium steel and stainless steel, which is correctly hardened and tempered for strength and durability. It has a blackened hex shank and body for extra grip. The screwdriver bits are secured magnetically for accurate driving. The shock absorbing design increases torque performance. Specifically designed for use with an impact driver. Features and Benefits • Specifically designed for use with an impact driver • Screwdriver bits are secured magnetically for accurate driving • Manufactured from chrome vanadium steel and stainless steel • The shock absorbing torsion design increases torque performance • Blackened hex shank and body for extra grip Specifications Length: 150mm Shank size: 1/4" Hex (F) x 1/4" Hex (M) Material: CRV & stainless steel Contents 1 x Draper Expert Impact Magnetic Bit Holder, 150mm, 1/4" Hex