Lee Valley HCS 82° Single-Flute Countersinks

These are exceptionally smooth high-carbon steel countersinks.

Used after pre-drilling for a screw, they cut cleanly and are chatter-free. The cone tip assures accurate centering and the cutter design ejects chips rapidly. They can also be used for counterboring as necessary.

Available in two sizes: 3/8″ dia. (1/4″ shank) and 1/2″ dia. (5/16″ shank). 82° countersink.