General description The US PRO 40pc Bit Set is a comprehensive collection designed for versatility and efficiency in various DIY and home improvement tasks. This set includes a range of hex, spline, and star bits, suitable for both deep and shallow applications, making it an essential addition to any toolbox. Technical specifications Includes 40 pieces Bit Holder 1/2" Drive x 10mm Bit Holder 3/8" Drive x 10mm 7 x 30mm Hex Bits: 4, 5, 6, 7, 8, 10, 12mm 7 x 75mm Hex Bits: 4, 5, 6, 7, 8, 10, 12mm 5 x 30mm Spline Bits: M5, M6, M8, M10, M12 5 x 75mm Spline Bits: M5, M6, M8, M10, M12 7 x 30mm Star Bits: T20, T25, T30, T40, T45, T50, T55 7 x 75mm Star Bits: T20, T25, T30, T40, T45, T50, T55