GAF Timberline HDZ Reflector Series Stone Gray Algae Resistant Architectural Asphalt Roof Shingles, 33.33 sq ft per Bundle Portable Generators Sub Brand Drill America CA Residents: 20V MAX Sub Brand Drill America CA Residents: Prop 65 Warning(s) Yes Diameter Measurement 1 in For Use on Glass No For Use on Wood Yes Total Number of Pieces 1 Warranty None For Use on Ceramic No For Use on Concrete No For Use on Grout No Material Tungsten carbide Set Individual Individual For Use on Metal Yes For Use on Drywall No Type Bur For Use on Plastic Yes Application Cutting Versatile Mounting Options: Can be bolt mounted or in ground mounted This is the finishing touch that makes a home feel polished and luxuriously composed Timberline HDZ RS shingles are CRRC rated and meet Title 24 cool roof requirements