Features:* .* Carbon steel material is preferred, which is harder than ordinary drill bits and more wear-resistant.* Four-blade design, small notch resistance and small notch resistance, precise and trouble-free punching.* The surface of the drill bit body is treated by centerless grinding, and chip removal is smoother.* The drill bit shank is cut into a solid hexagon, which makes the mounting of the electric drill safer, and the drill hole less slippery. Specification:Name: multi-function triangle drill bitMaterial: carbideColor: BlackSize: 4mm/5mm/6mm/8mm/10mm/12mmOptional Type: 6pcs (4/5/6/8/10/12mm),6pcs (6/6/6/8/10/12mm) ,5pcs (6/6/8/8/10mm) ,5pcs (4/5/6/8/10mm) ,4pcs (6/8/10/12mm)Features: Carbide, VersatileCompatible Equipment: Lithium Drill/Hand Drill/Bench DrillApplication: Glass, Ceramic, Vitrified Tile, Ceramic Tile, Brick Wall, Wood, PlasticNote:Lithium Electric Drills Lower Than 24V are not recommended for use and cannot be obtained without sufficient strength. When perforating walls, you need to change the position of the rebar, otherwise it will cause the edge to fall. Vitrified tiles, ceramic tiles and granite need to be cooled by waterPackaging List:6pcs/5pcs/4pcs * multifunctional triangular drill bits