31 piece Torx and Pozi compatible bit set. Elite performance screwdriver bits. Optimal shock absorbing torsion zone for high torque applications. Made with specially engineered hardened steel to extend wear resistance and bit life. High tolerance machined tip reduces cam out and screw head damage. 1/4" hex shank. Finish: Black Phosphate.Set contains: PZ1 x2, PZ2 x5, PZ3 x2. T10 x1, T15 x2, T20 x5, T25 x5, T27 x1, T30 x5, T40 x2. 60mm bit holder x1.