Impact grade power tool bits for the professional user. Forged from high quality S2 steel. Specially heat treated CNC precision machined tips reduce stress and prevent cam-out under load. Torsion bits absorb impact and transfer maximum torque to the fixing.3pc 50mm Hex 4mm Impact Power Tool Bit Set• Impact grade power tool bits for the professional user.• Forged from high quality S2 steel.• Specially heat treated CNC precision machined tips reduce stress and prevent cam-out under load.• Torsion bits absorb impact and transfer maximum torque to the fixing.• Lifetime guarantee*.• Model No. AK8237Model No: AK8237:Brand: Premier:Length: 50mm:Nett Weight: 0.032kg:Type: Hex:PTDSEAAK8237