Drill America 5 Piece Tungsten Carbide 3 16 in Cutting Bit Accessory 8 Lightweight and easy to handle Lightweight and easy to handle the coir tree rings are lightweight and very easy to work with 750 RPM with a clutch in low gear 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 Diameter Measurement 3 16 in Set Individual Individual For Use on Metal Yes For Use on Drywall No Type Bur For Use on Plastic Yes Application Cutting shank allow use with a wide variety of tool holding systems Tree Shape