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and 10 inch impact extensions
The 6-lobe
longer and produces smoother holes than standard drill bits
Size SF-6NF
Size: 25/64"
1" X 5/16" Pilots for Counterbore Shopify Collective and 10 inch impact extensionsProduct Description Counterboring is the enlargement of a portion of a hole that has previously been formed. If the counterbored portion is shallow (1 8" or less), the operations is usually known as spot facing; for example, a flat seat for a bolt head or nut. If, on the other hand, the hole is enlarged to a considerable depth, it is designated as counterboring. These counterbores are made of two piece construction, having an integral shank and
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