3" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number DWTB1-3/4-5

Part Number DWTB1-3/4-5

Part Number DWTSH1-3/4-20

Part Number: 25CHSNB

Part Number: BIT-KFDD

Part Number: DURSP18-CLEAR

3" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 Part Number DWTB1-3/4-5Product 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