The 1000 Mity Master Screwdriver Bit Set. Get this professional Chapman set featuring 12 Metric MM Allen Hex bits, 5 Ball Allen Metric MM Hex Bits, 3 Robertson Bits, 12 SAE Hex Bits, 14 Slotted Bits, 2 JIS Bits, 4 Phillips Bits, 7 Ball Allen SAE Bits, 1 Socket Adapter, 8 Star (Fits Trox) Bits, a mini ratchet, a screwdriver handle, and two spinners in a compact case. The screwdriver insert bits measure: 1.27 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 7 mm, 8 mm, B3.0mm, B4.0mm, B5.0mm, B6.0m, B8.0mm,61(#1 Robertson), 62 (#2 Robertson), 63 (#3 Robertson), .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", .125 x .023 (#88), .160 x .030 (#89), .190 x .025 (#90), .190 x .037(#25), .230 x 037(#26), .250 x .025 (#93), .250 x .037 (#17), .328 x .030(#95), .328 x .037(#96), .375 x .025(#97), .375 x .037(#98), .375 x .050(#19), .328 x .050 (#91), .190 x .030 (#92), CP1 (JIS1), CP2 (JIS2), P1, P2, P3, P4, B1/8", B9/64", B5/32", B3/16", B7/32", B1/4", B5/16", 1/4" Socket Adapter, S6, S8, S10, S15, S20, S25, S30,and S40. Machined from USA steel and heat treated with a black oxide rust inhibitor finish, each piece is precision milled to tight tolerances with flat edges, sharp corners, and no burrs for a snug screw fit. Bits are engineered to bend or break before damaging the screw they fit! Each bit has ear/ring stops with a ball detent to hold the bit securely in our tools, knurled ends for finger tightening, and are stamped with the part number, plus they’re non-magnetic for safe use on electronics and PC boards.