1-1/8" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number DWT60887

Part Number DWT60887

The set includes a range of ball-end hex L-keys

Part Number DWDRSD3/8X17/32

Part Number TSC1/2-16

Part Number MMO1/8-4FSE-BN

1-1/8" X 5/16" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Part Number DWT60887Product 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