Description
This piloted counter bore is ideal to countersink the head of the RIVET-5 in wood, bone, or similar materials. It is NOT intended for use with metal! The 5/16″ diameter has a 21 (.159″ diameter) pilot. Use a No. 21 drill bit and pre-drill each rivet location, then follow up with this tool to piloted counter bore for the rivet head. Wear safety glasses during any drilling operation.
