General description AlwaysH Pack 3-12mm Twist Drill Bit features a U-slot shank edge designed for electric drills, providing sharp cutting edges that minimize chatter. The staggered cutting teeth ensure smooth and clean drilled holes, making it suitable for a variety of materials. Technical specifications Sizes: 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm Material: Carbide Color: Black Compatibility and accessories Compatible with lithium electric drills, hand drills, and bench drills Usage Ideal for drilling into glass ceramics, vitrified tiles, ceramic tiles, brick walls, wood, plastics, cement concrete, and travertine Reduces cracking while drilling Other information U-shaped drill design enhances cutting speed and prevents slippage Hexagonal handle design prevents slippage Electrophoretic paint coating prevents rusting Efficiently removes flakes and debris for clean results