Product Description 13 Piece General Impact Bit Set 5/16" Drive This Kincrome Impact Driver Bit set contains 13 high-quality 36mm impact bits and is designed for use with 5/16" drive manual impact drivers. Features • 5/16" Hex Drive• Manufactured from Chrome Vanadium Steel (Cr-V)• Suitable for use with ID3400 & ID3500 Contents 36mm 5/16" bits:• Phillips: No.1, 2, 3, 4• Blade: 5, 6, 8, 10, 12mm• Hex: 4, 5, 6, 8mm