General description This Draper Expert 40-Piece 1/4 Inch Screwdriver Insert Bit Set is designed for both professional and DIY use. The set includes high-quality screwdriver bits made from S2 steel, which is properly hardened and tempered for enhanced durability. The bits feature a satin chrome plated finish that provides excellent corrosion resistance. They are organized in a two-tone 1/4 drawer EVA insert tray made from closed cell foam, ensuring easy storage and accessibility. Technical specifications Material: S2 steel, hardened and tempered Finish: Satin chrome plated Storage: Two-tone EVA insert tray with closed cell foam Contents: Various sizes of Hex, XZN, and Torx bits, as well as bit holders Bit sizes: 30mm and 75mm lengths Compatibility and accessories Compatible with Draper and Draper Expert tool chests Suitable for use with standard 1/4", 3/8", and 1/2" drive tools Includes bit holders for 3/8" and 1/2" square drives Installation Insert the desired screwdriver bits into