This set includes five countersink drill bits designed for drilling pilot holes for wood screws of various sizes.

• Includes bits for screw sizes #5, #6, #8, #10, and #12

• High carbon steel construction with steel counter sleeve

• Adjustable counter sleeve depth using Allen wrench

• Standard 1/4 inch hex shank for quick bit changes

• Combined drill and countersink for efficient drilling without changing bits

• Drilling length can be adjusted by loosening and tightening setscrew

• Drill bit lengths range from 50mm to 65mm