The straight-flute and spiral-flute reamers are generally used by hand while the helical-flute is designed for machine use
securely holding your workpieces in place
Durable Construction: Made from high-quality materials to withstand heavy use and provide long-lasting performance
Choose the Drill America - 11/16-18 UNS HSS Taper Tap for unmatched reliability and performance
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11/16" X 3/16" Pilot Hole HSS Taper Shank Counterbore - High Performance & Durable Cutting Tool | Drill America Burs & Rotary Files The straight-flute and spiral-flute reamersCounterboring 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