9/64" Hinge Center Hinge Bit by ARCO. This is for #8-10 screws. These are adjustable for exact depth. This HSS bit drills through steel, wood and plastic. The spring-loaded beveled drill-guide centers every hole accurately. These are top quality and made in the USA.

Beveled "finder" of spring-loaded hinge center bits with drill depth adjustment assure centered drilling and accurate depth of hinge holes. To set drill depth, loosen screw, move bit and tighten. Bits may be replaced with any standard bit of the same diameter