Concrete drill bit set made of hard and durable Cemented Carbide with the Thickened Tip, the hardness is higher than the ordinary drill bit. Solid twist drill bits openings are smooth, will not cause tremors. U groove drill bit design, surface rust treatment with copper plating, drilling and chip removal more smoothly. Installer drill bits set for use with electric or cordless hammer drills, Ideal for drilling holes in concrete, ceramic tile, brick, wood, plastic, soft metal, stone, and masonry.
HSS or high speed steel bits are made from carbon steel with the addition of other elements such as chrome and vanadium. This allows them to be used at high drilling speeds. HSS bits can be used to drill iron, steel and other metals such as brass, copper and aluminum alloy.