Grizzly 3/4" Bore Shaper Cutters feature top-quality C-2 carbide--the best available for wood cutting applications. Shaped and sharpened with diamond wheels as fine as 600 grit, these outstanding cutters are constructed with a high-tensile, silver-based brazing, which offers the utmost in strength and durability. Can be used on woods, wood composites, plywood and some plastics at 5,000 to 10,000 RPM. An excellent selection.