General description Masonry drill bits made of high-quality tungsten carbide with a strengthened head, offering high hardness and resistance to breaking and bending. These bits undergo rust treatment for a long service life. The multi-grind edges deliver high drilling speed, performing 85% faster than standard bits, while the U-shape groove ensures effective chip removal. The triangle design of the shank helps prevent slipping and wandering, making them compatible with most hand electric drills. Ideal for a wide range of materials including metal, glass, ceramic tiles, wood, ceramics, stone, concrete, and bricks. Technical specifications Material: Cemented carbide Color: Blue Quantity: 10 pieces Sizes: 4x 6mm (1/4 inch), 2x 8mm (5/16 inch), 2x 10mm (3/8 inch), 2x 12mm (1/2 inch) Usage When drilling hard materials, it is recommended to use water for lubrication. Other information