2" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: BIT-SDS3164

Part Number: BIT-SDS3164

Part Number: EZ-SK20915

Part Number DMODA

External Thread: 3/8"-16

Part Number: BIT-DWDMM13

2" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number: BIT-SDS3164Product 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