DEWALT 21 Piece Assorted Black and Gold Coated HSS Twist Drill Bit Set Horizontal Mailbox Ethafoam mounting strips to protect GlueCore Ethafoam mounting strips to protect the trucks finish Phillips gripSTIK J Trim provides a finished edge at door and window openings along with other various wallboard intersections Brand Model Compatibility Universal Type Jobber length Bit Length Set Shank Size Set Shank Type 3 flat Right Left Hand Right handed Tip Geometry 135 degree split point Heavy Duty No Material Black and gold coated HSS Package Quantity 21 For Use on Fiberglass No For Use on Metal Yes For Use on PVC Yes For Use on Stainless Steel Yes For Use on Wood Yes Set Individual Set CA Residents: Prop 65 Warning(s) Yes Warranty None Bit Diameter (Letter) Assorted Bit Diameter (Inches) Assorted Bit Diameter (mm) Assorted Bit Diameter (Number) Assorted Maximum Drilling Depth Set 135 ° Split point tip design to help reduce walking High speed steel to be used in plastic