Self-Centering Hinge Bit

Model: #A99SCHB1

This addition to the Ryobi Door Lock Program allows you to perfectly drill pilot holes for hinge and hardware installation. Our countersink can be used with #8, #10, and #12 screws. Be sure to look at the rest of our door lock products for all of your door lock projects!


This is a consumable item and therefore is not covered by a warranty. It is warranted against defective parts and labor only and not from misuse or deterioration of the product through normal wear and tear.

View our current catalog for new product releases and the latest RYOBI savings!

Ryobi Help+

Your one stop destination for tips & techniques, manuals, troubleshooting, FAQs and more!


  • Center drilling for 1/8 in. pilot holes for hinge and hardware installation.
  • Countersink for use with #8, #10, #12 screws


  • (1) Self-Centering Hinge Bit


Self-Centering Hinge Bit