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Features: C-6 Carbide for use in harder materials but also works great in aluminum and other soft metals All shanks are held to 0.0000-0.0005" from the nominal diameter and made of special heat treated alloy steel Product Description: Shank Diameter:1/2" Minimum Boring Range: 5/16" - 9/16" (see below) Overall Length:2-1/4" to 4-1/2" (see below) Boring Depth Range: 3/4" to 3" (see below) Contains (3) pcs. 5/16" minimum bore (1 ea. 3/4" bore depth x 2-1/4" overall, 1 ea. 1-1/8" x 2-5/8", & 1 ea. 1-1/2" x 3") .
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