These Erbauer mixed impact bits are made from steel (s2 grade) Erbauer Mixed Impact Bit Set includes 3x phillips (PH1, PH2 and PH3), 5x pozidriv (PZ1, PZ2 and PZ3), 3x torx (T20, T25 and T30), slotted (6mm), quick change chuck (65mm) and plastic storage box Geometrically designed precision tip that fits into fasteners more precisely, reducing stripping and cam-out Erbauer Mixed Impact Bit Set is made from cold-forged high-grade steel that makes this a heavy-duty product, capable to withstand high torque output Highly visible laser-etched markings Bits are built with impact drivers for maximum durability and long life Shank type: Hex; Standard: DIN 3126