1-11/16" X 7/16" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America End Mills & Milling Cutters Trusted by professionals worldwide

Trusted by professionals worldwide

Compact and Adjustable: The compact design makes it easy to mount and adjust

Drill America - 2-3/4 x

Size: m18 x 1

1-11/16" X 7/16" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America End Mills & Milling Cutters Trusted by professionals worldwideCounterboring 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