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1-1/4" X 3/8" Pilot Hole HSS Straight Shank Counterbore - High Performance & Durable Cutting Tool | Drill AmericaCounterboring 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 counterbore cutter, and a

**Product Specifications:** **Size:** V **Material:** High Speed Steel **Finish:** Black Oxide **Flute Length:** 4-3/8" **Overall Length:** 7" **Shank Type:** Round **Key Features:** - A dependable

Size: 3/8"-#27

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