Tom, A popular brand is "Insty Bits". I just saw them in a catalog from Rockler Woodworking. Google for Insty-Drive or go to www.Rockler.com and search there. Good luck, steve Steve R. M-15 #119 Lexington, KY

Somebody refresh my memory about the type of drill I need to drill the bolt hole and countersink for the screw head and bung in a single operation please, and a recommended manufacturer.