CRL 18CS Brand 9/16" Countersink for 12 to 16 Screws

CRL Countersinks are 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" (6 mm) shank diameter fits any 1/4" or 3/8" drill chuck.
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