DEWALT Extreme Metal Drill Bits are suitable for portable or stationary drilling of steel, alloyed and non alloyed, up to 900N/mm. Particularly suited to drilling sheet or thin materials where accurate burr free holes are required. Very effective in wood and plastic materials. The patented split pilot point design eliminates walking/slipping on contact. DT5921: 10 Piece: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10mm DT5923: 19 Piece: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 and 10mm DT5929: 29 Piece: 1, 1.5, 2, 2.5, 3, 3.2, 3.3, 3.5, 4, 4.2, 4.5, 4.8, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13mmThe DEWALT DT5921 Extreme Metal Drill Bit Set is supplied in a plastic case, with the following sizes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10mm.