43/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective this set includes diagonal cutters

this set includes diagonal cutters for copper

Diameter/Pitch: 5/8"-11

Part Number: 75C600HCS8Y/USA

Part Number: BIT-T/A54765

43/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective this set includes diagonal cuttersProduct 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