21/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Height: 57-1/2"

Height: 57-1/2"

• Shallow and deep 12-point opening fits double hex (12-sided)

Part Number: M16C120SHCSA2/D

Part Number: 2501-BDLP-102-3S-5295

Part Number: BIT-DWDRSD1-7/32

21/64" X 3/32" Pilot Hole HSS Straight Shank Counterbore Quantity:1 Height: 57-1/2"Product 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