Multi-material drill bits, tungsten carbide tipped, extra hard Tungsten-Titanium-Carbide tips, diamond ground cutting edges, high temperature brazed, chip removing, asymmetrical spiral for optimal waste removal, for all rotary and impact drills. Copper colour, ground surfaces, for masonry, marble, reconstituted stone, concrete, granite. brick, ceramics, hard- and softwoods, plastics and acrylic, alloyed and unalloyed steel, glass and crystal.