Drill America 5 Piece Tungsten Carbide 5 16 in Cutting Bit Accessory Vinyl Treads risers Uncoupling membrane for tiled floor Uncoupling membrane for tiled floor applications Prevents cracked tile and grout and provides waterproofing Ditra is 1 8 in thick and is designed for ceramic and stone tile Install over a wide range of substrates This drill is backed by a 2 Year Limited Warranty for added peace of mind Sub Brand Drill America CA Residents: Prop 65 Warning(s) Yes For Use on Glass No For Use on Wood Yes Warranty None For Use on Ceramic No Total Number of Pieces 5 For Use on Concrete No For Use on Grout No Material Tungsten carbide Set Individual Individual For Use on Metal Yes Diameter Measurement 5 16 in For Use on Drywall No Type Bur For Use on Plastic Yes Application Cutting stainless steel and metals Double cut style for rapid material removal in tough applications Solid carbide tooling provide long life and faster cutting speeds Round 1 4 in