ITEM NAME:5pcs Hex Shank 10mm Tip Glass Tiles Cutting Thread Drill Bits Slotted Point Description: Ideal for drilling holes in tiles, ceramic or wall mirrors Strong toughness and wear resistance, can be installed in the hand drill, electric drill. Small cutting resistance, improve the trepanning speed Provide smooth, accurate drilling in ceramic tile, marble, china, mirrors and glass High quality cemented car.Ideal for drilling holes in tiles, ceramic or wall mirrors. 5 Pieces Drill Bits. 10x 85mm (Dia. Strong toughness and wear resistance, can be installed in the hand drill, electric drill. Provide smooth, accurate drilling in ceramic tile, marble, china, mirrors and glass. ).