Item Type: Drill Bit Set_x000D_ Material: Cemented Carbide_x000D_ Application: Glass, Ceramic, Glass Tile, Full Tile, Brick Wall, Wood, Plastic_x000D_ Compatible Equipment: Lithium Drill, Hand Drill, Table Drill_x000D_ Gross Weight: 84-189g / 3.0-6.7oz 1PRECISE AND EASY STAMPING: Drill bit tip tools feature a four blade design with low kerf resistance for precise and easy stamping. 2NO BROKEN EDGES: Drill bit surface uses grinding processing for smoother chip evacuation. No broken edge, no chattering and easy to break. 3HEX POWER BITS: The drill shank is cut into solid hex shape, which makes the drill clamping more secure and drilling less slippy. 4UNIQUE CROSS DESIGN: Hex power bits feature a unique cross angle design for low shear strength and stable, fast drilling with no broken edges. 5CEMENTED 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_x000D_ _x000D_ DrillBitPlease allow some error due to manual measurement.