General description This professional-grade Draper TX-STAR/HEX/XZN 40-Piece Mechanic's Bit Set includes a variety of high-quality bits and holders designed for durability and precision. Ideal for various DIY and home improvement tasks, it offers reliable tools for different screw types and sizes. Technical specifications Contents: 40 pieces including multiple bits and holders Bit sizes: T20, T25, T30, T40, T45, T50, T55, and XZN sizes 5, 6, 8, 10, 12mm Bit lengths: 30mm and 75mm options Bit holders: 10mm hexagon with 3/8" and 1/2" square drives Material: S2 silicon steel for bits; chrome vanadium steel for holders Finish: Shot blasted for bits; chrome plated for holders Compatibility and accessories Compatible with standard power tools and manual screwdrivers with 3/8" and 1/2" drives Includes spare bits for extended use Installation Insert the desired bit into the compatible bit holder or power tool chuck Ensure the bit is securely fitted before use to prevent slipping or damage No