5-16mm Hexagonal Shank Brazed Dry Ceramic Tile Drill Bit Marble Granite Vitrified Tile Hole Opener Diamond Drill Bit Hole Saw

Type: hole opener Features: 1.Good helper for installation Hexagonal dry drill bit 2.Filled with secret cooling wax to lubricate the drill bit. 3. Thickened diamond sand, no need to add water. 4. High-strength alloy steel material Integral heat treatment