The HSS Cobalt Drill Bit Set (25 pieces, 1-13mm x 0.5) is a premium set of drill bits designed for tough materials like stainless steel, metal, and hard alloys. The set features a range of sizes from 1mm to 13mm, with 0.5mm increments, providing versatile options for various drilling tasks. The 3-sided shank design ensures a secure grip in the drill chuck, reducing slippage during use. Packaged in a durable metal case, this set is ideal for professional use in machining, construction, and industrial applications, offering durability, precision, and reliable performance.