Comprehensive 49 piece impact resistant bit and nut driver set. Includes a range of 25mm and 50mm bits with 3 x nut drivers and 1x impact magnetic bit holder. Designed to handle the most demanding impact driving applications with unbeatable break resistance. Comes in a tough case with easy release bit holders. Formulated to absorb the torque peaks of highly powered impact tools Newly developed heat treatment process for longevity and performance Bit hardness is reduced at the body to withstand high loads Black phosphate finish for enhanced corrosion resistance" Driver Bit Size: PH1,PH2,PH3,PZ1,PZ2,PZ3,TX20,TX25,TX30,TX40,SQ2 Length mm: 25, 50, 60, 65 Shank Dia. inch: 1/4 Shank Type: N/A Material: Carbon Steel Timco Impact Driver Bit Set - Case (Size 49pcs - 49 Pieces) in Black