FastCap Flushmount Drill Bit- To enhance the high quality and improved cosmetics offered by Fastcap, we offer our NEW and improved FlushMount Drillbit System with 9/16" Carbide Drillbit and Bearing Stop Collar. The custom countersink bit allows the user to drill a pilot hole and countersink for the Fastcap in one operation. The carbide drill bit and custom two-part delrin stop collar insures that the surface cannot be marred.