YATO YT-0400 is a 40-Piece Screwdriver Bit Set with 1/2" and 3/8" mounting. Its features include high quality S2 tool steel bits, chrome vanadium alloy steel shanks for exceptional torque strength and durability, and universal quick change 1/2" and 3/8" mounting for easy bit changes. The kit includes Phillips, Pozidriv, Torx, Hex, Triwing, and TORX Security bit types. The bits are conveniently organized in a holder for easy access and storage. This set is designed for professionals and DIYers to easily accomplish any small task. It is perfect for automotives, small appliances, electronics, furniture, and more.