Bosch 1 2 in Carbide Tipped Pilot Panel Router Bit Picket Fencing Its washer type head has Its washer type head has no sharp edges like conventional lag screws and the added shoulder underneath the washer has the ability to center the RSS screw in predrilled hardware Q1: What material is used for the Veranda Glendale White Vinyl Fence Panels and paneling Drill through pilot for guiding on templet or framing after panel has been mounted Micrograin carbide tip provides superior wear resistance and long life 75 Bearing Diameter N A Warranty 1 year Sub Brand N A Overall Diameter 1 2 in CA Residents: Prop 65 Warning(s) No UNSPSC 27112800 Center Pilot None Bit Shank Diameter 1 2 in Bit Material Finish Carbide tipped Drill Through Point Included No Bit Angle Flush