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deep flutes
Size: 15/16"-27
50mm HSS Drill Bit Kit and experience the perfect combination of performance and protection for your professional needs
Drill America - 4 x 1/8 x 1 HSS Metal Slitting Saw with Side Chip
7/16" X 1/8" HSS Aircraft Counterbore 1/4" Shank - High Performance & Durable Cutting Tool | Drill America Hole saws deep flutesCounterboring 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 counterbore cutter, and a