This Hitachi 102 piece set contains an assortment of commonly used drilling and driving bits for common household projects.Contents:-20 x HSS black oxide drill bits 1x5, 1.5x5, 2x4, 3, 3.5, 4, 4.5, 5 and 6mm.4 x Masonry bits carbide tipped 3, 4, 5 and 6mm.1 x Countersink insert bit 12.7mm.3 x Phillips 50mm insert bits PH1, PH2 and PH3.3 x Pozidriv 50mm insert bits PZ1, PZ2 and PZ3.2 x Torx 50mm insert bits T20 and T25.19 x Phillips 25mm insert bits PHOx3. PH1x4, PH2x8 and PH3x4.11 x Pozidriv 25mm insert bits PZ1x3, PZ2x5 and PZ3x3.14 x Slotted 25mm insert bits 3x3, 5x3, 6x4 and 6.5mmx4.3 x Square 25mm insert bits S1, S2 and S3.14 x Torx 25mm insert bits T10 x2, T15 x2, T20 x 2, T25 x2, T27 x2, T30 x 2 and T40 x2. 7 x Hex 25mm insert bits 1.5, 2, 2.5, 3, 4, 5 and 6mm. 1 x Magnetic insert bit holder 60mm chrome plated.