37/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWDST53/64

Part Number DWDST53/64

This versatile set includes left-handed drill bits and extractor bits

Part Number DEWA4333

Part Number DMS04-1102

Part Number DWTSH3/8-27

37/64" X 3/16" Pilot Hole HSS Straight Shank Counterbore Shopify Collective Part Number DWDST53/64Product 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