DeWalt: DT4957-QZ29 Piece HSS E Cobalt Drill Bit Set 1.0 - 13mm in a Plastic Cassette This cobalt metal drill bit set from DeWalt provides improved performance with a 4 x longer life and double the resistance to breaking. With a 50% improvement in drilling speed this drill bit is perfect for tackling stainless steel. Features: 4 x Longer life. 2 x Resistance to breaking. 50% faster drilling speed. Ideal for drilling into stainless steel. 3 x flats prevents chuck slipping on shank MPN: DT4957-QZ EAN: 5035048535066 DT4957-QZ29 Piece HSS E Cobalt Drill Bit Set 1.0 - 13mm in a Plastic Cassette Attributes: Drill Bit Type: Drill Bit Set Drill Diameter: 1-13mm MFR Part No.: DT4957-QZ Number of Pieces: 29piece Pack Quantity: 29 Shank Type: Straight System of Measurement: Metric