If you've ever drilled holes in a scrap piece of wood to make your own drilling guide, you need this insert. Just drill a 5/8" hole, drive in an insert, and thread in the appropriate-sized Imperial or metric bushing (sold separately).
The steel insert is ribbed on the side to hold securely in place and is just shy of 1/2" high. It can be reused again and again. Superb for making jigs for repetitive drilling operations such as installing hinges, handles, slides and knobs.
Made in USA.