Solid Carbide Flush Trim Router Bits Spiral With Nano Coated,, Cut By Eanosic. EANOSIC 1/4-Inch Shank Upcut Spiral Flush Trim Router Bit with Top Bearing - Nano blue coating Series Router Bits utilizes a special unique carbide with composite coating for a longer lifetime (up to 2.5X longer life compared to uncoated bits) in modern materials. - Nano blue coating enables the tool's cutting edge to retain crucial sharpness and lubricity. This provides longevity and produces cutting results of the highest quality. - Coating prevents high heat and oxidation which is detrimental to cutting tool performance. Professional Flush Trim Router Bit with Top Bearing: 1/4? Shank, 1? Cut Length. The two independent ball bearings with forced on steel collars at the tip of each bit ensures smooth worry free use. INDUSTRIAL QUALITY UPCUT FLUSH TRIM ROUTER BIT: Made of solid VIRGIN carbide with NANO blue coated. And Nano Blue Coating with high hardness and heat resistance enables the tool's cutting edge to retain crucial sharpness and lubricity. This provides longevity and produces cutting results of the highest quality. Up to 2.5X longer life compared to uncoated bits. The 1/4-Inch flush trim Router Bits apply to various wood: such as Plywood, OAK, MDF, and any hardwood working and Long service life for sharp. The spiral router bit suit for CNC router and any plunge routers with 1/4" collet.