General description This extensively equipped 256-piece drill and screw bit set is suitable for drilling wood, stone, and metal. It is supplied in a compact and durable plastic carry case, making it easy to transport and store. Technical specifications 45x HSS-R Metal Drill Bits: 1 x 4, 1.5 x 4, 2 x 6, 2.5 x 3, 3 x 6, 3.2 x 2, 3.5 x 4, 4 x 6, 4.5 x 3, 5 x 2, 5.5, 6, 7, 7.5, 8 8x Wood Drill Bits: 3, 4, 5, 6, 7, 8, 9, 10mm 5x Flat Bits: 12, 16, 20, 22, 25x150mm 9x Masonry Drill Bits: 3, 4, 5, 6, 7, 8x120mm, 8 & 10x300mm 1x Countersink Bit 110x Screw Bits (25mm) 20x Screw Bits (50mm) 2x Socket Adaptors: 1/4" DR, 3/8" DR 1x Magnetic Bit Holder 20x Nut Setters: 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16", 1/2", 5, 5.5, 6, 7, 8, 9, 10, 11, 12, 13 4x Hole Saws: 32, 38, 45, 54 1x Hole Saw Adaptor 1x Diameter Gauge 1x Hex Wrench 4x Depth Stops: 3, 5, 8, 10mm 8x Hex Key Wrenches (mm): 1.5, 2, 2.5, 3, 4, 5, 5.5, 6 8x Hex Key Wrenches (inch): 1/16", 5/64", 3/32", 1/8", 5/32",