1Used for the modeling of wood line, stair handrail. 2Selected high quality YG6 alloy to make the blade more sharp and durable. 3Heat resistant coating to prevent the accumulation of wood chips, resins, and bitumen. 4Strong steel body with anti-kickback design. 5Work with electric router, engraving machine, trimming machine, computer carving machine, vertical trimming machine.Item Type: Router Bit Material: YG6 alloy cutter head, 45 carbon steel cutter body Calabash Shape Handrail Router Bit: Total Length: 90mm/3.54in Shank Diameter: 8mm Blade Diameter: 41.3mm/1.63in Table Edge Armrest Router Bit: Total Length: 69mm/2.72in Shank Diameter: 8mm Blade diameter: 20mm/0.79in Center Minimum Cutting Diameter: 69mm/2.72in2 x Router Bit