THE ONLY Spektra Coated Bits ? Made in the USA spektra bits made in usa Solid Carbide Spektra Extreme Tool Life Coated Flush Trim Router Bits Industrial quality spiral router bit designed for trimming sheets of stack plastics and laminates in hand-fed applications. Double bearing provides smoother action around contour of the template. Cuts Coroplast (A soft plastic cardboard made with super soft, super flexible PVC). Amana Tool solid carbide router bits provide consistent, repeatable quality. Every tool is guaranteed to match the geometry on the prints, every time on every order. Best control of carbide grades for woodworking, and absolute control of quality standards on all carbide blanks. Spektra bits feature a nACo nanocomposite coating with an extreme nanohardness and heat resistance. With a brilliant distinctively-tinted coloring nACo provides additional improvements in four critical aspects of router tooling.