s is the leading manufacturer of high quality Cutting tools. Our assortment includes Counter bore, Reamer, Keyseat Cutter, Slitting Saw, Milling Cutter. We are committed to provide durable tools with home grown American pride. We manufacture an exceptional line of high performance cutting tools utilizing our unique and exclusive manufacturing process. Our skilled artisans are proficient in working with the most advanced technical resources to bring out ground breaking products.Features. 3/16 pilot hole diameter. 1/4 dia. Shank. 1/64 Corner Radius. For counterboring spotfacing where machine requires a smaller shank. 3 flutes. Specifications. Diameter Tolerance .001/0. Dimension 1 H x 1 W x 2.75 L. Weight 0.62 lbs