The Blue Spot Tools 26 PCE Impact Screwdriver And Nut Driver Bits are suitable for use with power drills and electric screwdrivers. The impact bits are manufactured from S2 steel and the nut drivers and magnetic bit holder are manufactured from chrome vanadium for increased durability. Supplied in a robust plastic box for easy and convenient storage. 7 PCE 25mm impact bits - SL5, SL6, PH1, PH2, T20, T25, S1. 11 PCE 50mm impact bits - PH1, PH2, PZ1, PZ2, PZ3, T20, T25, SL6, S2, S2, S3. 75mm impact bits - PH2, PH2, PH2. 3 PCE 65mm nut drivers - 6, 8, 10mm. 1 PCE 60mm magnetic bit holder. 1 PCE 65mm 3/8"AD. For the manufacturers lifetime guarantee, you just need to register online with BlueSpot Tools within 30 days of purchase.