This Faithfull Impact Screwdriver Bit Set contains 42 professional 1/4in hex drive impact bits that are specifically designed for use in high torque impact drivers. Manufactured from a unique material specially engineered for extreme durability, these bits have an increased working life compared to standard screwdriver bits. Impact bits are designed to distribute impacts evenly, preventing energy waste for efficient screwdriving, and incorporate torsion areas to absorb torque peaks, reducing stress at the bit tip during heavy loading. All bits feature a precision-machined tip to provide an optimum fit, helping to prevent screw stripping and cam-out. Supplied in a sturdy impact-resistant plastic storage case. Contains 8 x 25mm Phillips Bits PH1(x3), PH2(x3) and PH3(x2) 12 x 25mm Pozidriv Bits PZ1, PZ2(x8) and PZ3(x3) 11 x 25mm Star Bits TX10, TX15, TX20(x2), TX25(x4), TX27, TX30 and TX40 1 x 25mm Slotted Bit 6mm 2 x 50mm Phillips Bits PH1 and PH2 3 x 50mm Pozidriv Bits PZ2(x2) and PZ3 3