Faithfull 42 Piece Impact Screwdriver Bit SetThis 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