2" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 The end of the extension

The end of the extension has a spring-loaded pin detent that locks into the through hole on a socket

Pilot pin included

Handles on the side of the rack provide stability when latching components together

and hex nuts

2" X 1/2" Pilot Hole HSS Taper Shank Counterbore Quantity:1 The end of the extensionProduct 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