This is a #9 countersink bit made for drilling out set-screw holes. Set screws are an essential part of preventing spinners and keeping routes safe for climbers.
This bit can also be used in conjunction with The Lonestar™ to convert certain bolt-on holds into screw-on holds. Remember not all holds can be safely converted to screw-on holds and some holds will need more than 3 attachment points to safely install. Many Escape climbing holds can be safely modified if done properly, and some are designed to accommodate additional set-screw holes. However, this should ONLY be done by professional routsetters that understand how to safely convert bolt-on holds into screw-on holds. Improper alterations can also be dangerous, causing a hold to crack and/or break.
Modifying climbing holds or adding additional set-screw holes may void your manufacture warranty (Escape's or otherwise). Follow manufacturers recommendations whenever adding set-screw holes.