Solid Carbide Spektra(TM) Extreme Tool Life Coated Router Bits.Designed for the most demanding signmaking tasks. These router bits are excellent for creating signs and other projects in a variety of materials. Each router bit is manufactured from Amana's exclusive grade carbide according to stringent quality standards.Spektra(TM) bits feature a nACoA(R) nanocomposite coating with an extreme nanohardness and heat resistance to the router bit. With a brilliant distinctively-tinted coloring nACo provides additional improvements in four critical aspects of router tooling. nACo coating is an micro-thin ceramic coating which enables the tool's cutting edge to retain crucial sharpness and lubricity. This provides longevity and produces cutting results of the highest quality.Coatings prevents high heat and oxidation which is detrimental to cutting tool performance.Multi-colored hues, while attractive, will dissipate upon use and yet coating will remain fully effective.nACo offers approximately 4,500 Vickers for impressive solid hardness on cutting areas of the tool, for an increase up to 2.5 times compared to uncoated bits.Note: Blue based color dissipates immediately upon use. nACoA(R) nanocomposite coating will not wear off.Excellent for Cutting:LaminateMelamineMDF/HDFPlywoodVeneered PlywoodWoodSet #AMS-238-K Includes the Following Tools:46200-KSolid Carbide Spektra(TM) Extreme Tool Life Coated Spiral Flute Plunge, Downcut 1/8 Dia x 1/2 CH x 1/4" Shank Router BitView Details46202-KSolid Carbide Spektra(TM) Extreme Tool Life Coated Spiral Flute Plunge, Downcut 1/4 Dia x 3/4 CH x 1/4" Shank Router BitView Details46420-KSolid Carbide Spektra(TM) Extreme Tool Life Coated Spiral Flute Plunge, Downcut 3/8 Dia x 1-1/4 CH x 3/8" Shank Router BitView Details