Super strong, robust and durable metal. For use in hand drawers or other woodworking. Industrial grade router bits. Integral hardened steel body with backstop design. Heat resistant anti build-up Teflon coating. Hook and shear angles: allows high hook and shear angles. Blades cut material smoothly and produce clean, chip-free swarf. Bearings: fully enclosed and lubricated. Specification: 1/4 shank router bit Material: 45# steel Carbide tip: yg8 bar Diameter: 6.35mm Colour:Red Body: Solid hardened steel blade Blades: Industrial grade microcrystalline carbide Package includes: 7 piece milling cutter shank Diameter (in)* Blade diameter (in)* Blade length (mm). 1/4*1 /8*10mm, single edge 1/4*5/32*13mm, single edge 1/4*3/16*13mm, single edge 1/4*1/4*25mm, double edge 1/4*5/16 *25mm, double edge 1/4*3/8*25mm, double edge 1/4*1/2*25mm, double edge Caution. 1. Due to manual measurement, please allow 1-3mm variation. 2. Due to different monitors and different light, the picture may not reflect the actual colour of the item. Thank you for your understanding.