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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![CMT 392.400.11 Hinge Boring Bit, 40mm (1-37/64-Inch) Diameter X 5/16-Inch Parallel Shank](http://www.toolmanshop.com/cdn/shop/products/474_823_fz_392_a3f582bb-4a24-4416-82f9-c879fc1213c9_1200x.jpg?v=1571311539)
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.