CMT 392.400.11 Hinge Boring Bit, 40mm (1-37/64-Inch) Diameter X 5/16-Inch Parallel Shank

Hinge boring bits to set a new standard for performance and value! This bit features new downcut round sharpening for a more precise cut and extra-fine micrograin carbide for endurance and a faster feed speed. We use the finest industrial quality micrograin carbide to produce very sharp cutting edges and improve cutting resistance.

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