Drill America 5 Piece Tungsten Carbide 1 4 in Cutting Bit Accessory Power Tools Drill are available Vantage are available Dimex spikes are great for many other general landscape applications as well shank allow use with a wide variety of tool holding systems Cylindrical Shape 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 1 4 in For Use on Drywall No Type Bur For Use on Plastic Yes Application Cutting