General description This 5-piece countersink bit set is designed for efficient and precise countersinking of screw holes. It allows you to drill and countersink simultaneously, saving time and effort. Made from durable carbon steel C45, the set is suitable for use in hardwood, softwood, and plastics. The drill bits are high-speed steel and feature adjustable positioning secured with a hex set screw. Technical specifications Set includes 5 countersink bits Material: Carbon steel C45 for durability High-speed steel drill bits Adjustable and secured with hex set screw Quick-change 1/4" hex shank Compatible with drills with 10mm or 13mm chucks Installation Insert the desired drill bit into the countersink tool Secure the drill bit with the hex set screw Attach the countersink to your drill via the 1/4" hex shank Usage Use for countersinking screw holes in wood and plastics Adjust the depth of the countersink as needed Drill and countersink in one step for efficiency