1、PRECISE AND EASY STAMPING: Drill bit tip tools feature a four blade design with low kerf resistance for precise and easy stamping. 2、NO BROKEN EDGES: Drill bit surface uses grinding processing for smoother chip evacuation. No broken edge, no chattering and easy to break. 3、HEX POWER BITS: The drill shank is cut into solid hex shape, which makes the drill clamping more secure and drilling less slippy. 4、UNIQUE CROSS DESIGN: Hex power bits feature a unique cross angle design for low shear strength and stable, fast drilling with no broken edges. 5、CEMENTED CARBIDE: Drill tap bit set is made of carbide, and the oxidation extrusion process of the bit strengthens the hardness of the drill hole. 5 x Drill Bit Item Type: Drill Bit SetMaterial: Cemented CarbideApplication: Glass, Ceramic, Glass Tile, Full Tile, Brick Wall, Wood, PlasticCompatible Equipment: Lithium Drill, Hand Drill, Table DrillGross Weight: 84-189g / 3.0- 6.7oz