Features: 60-Piece Cobalt Carbide Set – Drills smoothly through metal, stainless steel, cast iron, wood, and plastic. Spiral Twist Design – High rigidity, efficient chip removal, and clean, accurate holes. 1.5–10 mm Diameters – Covers a wide range of drilling needs for DIYers and professionals. 39–133 mm Lengths – Versatile reach for deep holes and tight spaces.