Bosch Impact Control 31 Piece Screwdriver Bit Set Bosch 31 piece impact control screwdriver bit set. An impact driver bit set for use with all impact drivers and normal drill drivers, suitable for use in heavy-duty applications. Features and Benefits • Ideal for heavy-duty use • Suitable for use with high-voltage impact drivers • Manufactured from specially formulated V steel alloy • Torsion control to withstand the stresses of high torque applications • Black oxide finish • 1/4 inch Bit holder Contents • Bits 25 mm: 10x T2, 2x T25, 2x T30, T40 • Bits: 50 mm: PH2 PZ2 T20 T25 T30 • Double End Head Bits: 65 mm PH1, PH2, PH2/PZ2, SL1/5.5mm, T15/T20 (2x) T25/T30 • Socket-50mm: 8, 10, 13 mm • 1/4 inch Magnetic bit Holder • Robust case