C.R. LAURENCE CS6S CRL 19/64" Weldon Countersink
The CRL Weldon Countersinks were specifically designed to cut round countersunk holes in aluminum. They cut faster than standard countersinks and leave a finished hole every time. Smooth drilling action from single cutting edge prevents chatter and fluted edges. The 1/4 inch (6.4 millimeter) shank diameter fits any 1/4 or 3/8 inch (6.4 or 9.5 millimeter) drill chuck. Range of cut for this countersink is 1/8 inch (3.1 millimeter) to 19/64 inch (7.5 millimeter).
Best Countersink Available for Aluminum | Single Cutting Edge for Fast Removal of Stock | For No. 6 Screws