Specification:* Material: Cemented Carbide.* Color: Silver+Yellow .* Shank Diameter: 1/4" or 1/2".* Cutting width: 1/2".* Package: 1set of Router Bit with Bearings(Other accessories are not included).* Router Bit Size: 51.5 x 29.5mm/2.02 x 1.16"(L x Dia).Bearings Bit Size: 64.5 x 28.6mm/2.53 x 1.12"(L x Dia).Bearing Size: 3/8''(9.52mm), 1/2''(12.7mm), 5/8''(15.9mm), 3/4''(19.05mm), 7/8''(22.2mm), 1-1/8''(28.6mm).Cutting width: Approx. 12.7mm (1/2'').Blade height: Approx. 55.5mm(2.18'' ).1/2" Handle Diameter: 12.7mm/0.5".1/4" Handle Diameter: 6.35mm/0.25".Please attention: Due to manual measurement , there may be 0.1-0.3cm deviation exist,hope you can understand.* Features:-Made of hardened materials, these tools are very durable and not easy to wear .-Heat resistant coating prevents build-up of sawdust, resin and pitch Sharp cutting edge would improve working efficiency and product quality .-Comes with various size of bearings for different dimension needs.-Suitable for MDF, solid wood, particle board, plywood, etc ...-Usually use on electric wood routers or engraving machines for wood edge finishing.* Safety instructions:1. Razor blades permanently enclosed in a cartridge or housing with less than 2mm of blade exposed.2. The bladed product is not intended for people under 18 years old.3. The item is only for industrial cutting/engraving. Not for hazardous items.* About color:There are slight difference between the picture and the real item caused by light brightness,hope you can understand.Package included:1 set x Router Bit BearingNote:Please allow a little size errors due to manual measurement.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.