This DeWalt Black & Gold HSS drill bit set includes 19 pieces, designed for drilling into wood, metal, and plastic. The bits feature a speed tip for faster penetration and precise centering, and a tough core for increased durability and reduced breakage. The no-spin shank eliminates bit slippage, ensuring clean and accurate holes. The set comes in a tough case that is compatible with the TSTAK system for organized storage and easy transportation. The kit includes bits in popular sizes: 1, 1.5, 2 (x2), 2.5 (x2), 3 (x2), 3.5 (x2), 4 (x2), 5 (x2), 5.5, 6, 7, 8, and 10mm.