3" X 1/2" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America Repair Parts Superior Protection: CAT 2 rating

Superior Protection: CAT 2 rating with an 8

and fabrication projects

They provide a secure and precise fit

Overall Length: 2-1/8"

3" X 1/2" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill America Repair Parts Superior Protection: CAT 2 ratingCounterboring 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