If you've ever drilled holes in a scrap piece of wood to make your own drilling guide, you need these inserts. Just drill a 5/8" hole, drive in an insert, and thread in the appropriate-sized bushing.

The steel insert is ribbed on the side to hold securely in place and is just shy of 1/2" in height. The hardened bushings are 3/4" high with a knurled top for easy insertion and removal. Insert and bushings can be reused again and again. Superb for making jigs for repetitive drilling operations such as installing hinges, handles, slides, and knobs.

Bushings and insert sold separately. Insert fits Imperial and metric bushings.