Features: The carbide tip allows for precision positioning and drilling on a variety of materials. The spiral groove design helps chip removal so as to make drilling smoother. The unique triangular shank makes the clamping more firmly and does not slip. Made of cemented carbide, high hardness, low drilling resistance, improving work efficiency. Suitable for drilling holes on ceramic tiles, glass, plastic, wood, wall, etc. Specification: Item Type: Triangular-Overlord Handle Drill Bit Material: Carbide Optional Diameter: 6mm(10pcs), 8mm(10cps), 10mm(5pcs) Applicable Equipment: Ordinary pistol drill Package List: 1 x Drill Bit Set