.290" Min Bore X 1.250" Max Depth Right Hand Carbide Boring Bar, .006" Radius, 5/16" Shank, 2-1/2" Oal, .073" Projection 1.250" Max Depth,5/16" Shank,2-1/2" Oal Monster Solid Carbide Boring Bars Are Made From C-2 Grade Sub-Micron Grain Carbide With 10% Cobalt Content For The Ultimate In Boring Rigidity. Suitable For All Workpiece Material Groups. Featuring 2° End Relief, 6° Side Relief, Minimum Corner Radius, H6 Shank Tolerance, Mirror Polished Cutting Surface And A 4Rms Finish For World Class Finishes In Horizontal Machining. Right Hand Cutting With Lock Down Flat On The Shank To Automatically Locate The Tool On Center. Proudly Made In The Usa. Made In The Usa. Monster Tool Part #601-2901250

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