The WellCut 37 Piece Screwdriver Bits Set comes complete with a range of bit types from nut drivers, phillips, pozidriv and slotted components. A handy magnetic bits holder comes useful for interchanging bits between impact drivers. High quality storage case with safety latch included. Built from high quality fortified S2 Steel ensuring a solid build. Hardened rating at: CRV-6150. Features DESIGNED FOR IMPACT DRIVERS - Specifically designed to withstand the high torque range an impact driver delivers. QUALITY MATERIALS - A high-quality set of 37 bits mage from chrome-vanadium S2 steel. Hardened at CRV-6150. MULTI-PURPOSE - Wide range of interchangeable bits from Phillips, Slotted, Pozidriv, Torx and 4 nut drivers and a magnetic bits holder. PORTABLE STORAGE CASE - A convenient storage case is included to ensure your bits stay organised. VERSATILE AND APPLICABLE - In most cases, this product is commonly used for demands around the home, garage or for maintenance tasks.