21/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Drill Bit Size: 1

Drill Bit Size: 1

Part Number BRCF351

Overall Length 4-5/8"

Part Number DWT54966

Part Number: 100C600WASS

21/32" X 3/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Drill Bit Size: 1Product 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