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Counterbore Set, Interchangeable Pilot, HSS, 21 Piece

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$89.07 $134.95 In stock

21 Piece interchangeable pilot counterbore set used in spot facing and counterboring operations. Kit includes:
1 holder with 3/8" shank
6 counterbores, sizes: 5/16, 3/8, 7/16, 1/2, 9/16, 5/8"
14 Pilots: 5/32" Shank: 0.187, 0.204, 0.213, 0.229, 1/4, 17/64, 9/32, 5/16, 21/64, 11/32, 3/8, 25/64, 13/32 & 7/16"

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Customer Reviews (4.6 / 5 · 5 reviews)

Carter R. ★★★★★

Finally, a set where the pilots actually fit snug and don't wobble during use. The 3/8" shank holder feels solid, and the range from 5/16 to 5/8 covers the sizes I need most for spot facing jobs.

Lily Q. ★★★★★

After fighting with loose pilots on cheaper sets, I was relieved to see how snug these 14 pilots fit into the counterbores. The 5/8" counterbore took a clean, chatter-free spot face on some steel plate without needing a second pass.

Samuel ★★★★★

The 3/8" shank holder fits my drill press chuck perfectly, and having six counterbore sizes in one kit means I stopped swapping tools mid-job. The pilots are snug enough that they don't wobble, which made my spot facing come out noticeably cleaner than my old single-size setup.