The alloy triangle bit set features an innovative flute design leading to faster material removal for easier drilling. It offers a speeds tip which penetrates material quickly. Commonly used for tap con installation, and brick block fastening. Features - Color: Orange. - Material: Alloy. - Size: 12.00X0.70X0.70cm/4.72X0.28X0.28in - The head is made of cemented carbide. Triangular head resistance is smaller. - And it can improve work efficiency, higher hardness than ordinary drill bit, more wear-resistant. - The surface of the drill bit is treated by fine polishing, and the new electroplating process can prevent the drill bit from rusting and prolong the life of the drill bit. - U-shaped drain groove, spiral handle design, easy to remove chips during work, smoother drilling. - It can be used for drilling walls, bricks, ceramic, wood, glass, tiles, stainless steel, concrete, etc. Remember to add Water or coolant when drilling. - It combines the characteristics of ceramic drill bits and hammer drill bits for glass, tile, plastic, wood and cement-bearing wall openings. Package list: 1 x 4cm drill bit 1 x 5cm drill bit 1 x 6cm drill bit 1 x 8cm drill bit 1 x 10cm drill bit