6Pcs Cleaning Bottom Router Bit with 8mm Shank, Size: 8*18; 8*20; 8*22; 8*25; 8*30; 8*32. Solid hardened steel body with anti-kickback design, construction & Heat-resistant Teflon coating C3 micro-grain carbide end mill, double-edged cutting design, excellent concentricity Ideal woodworking tool for cutting all composite materials, plywood, hardwood and softwood Package includes: 6 x Cleaning Milling Cutters Tail:6Pcs 8mm Shank Functions: C3 Micrograin Carbide Burs. Solid hardened steel body with anti-kickback design. Construction & Heat-resistant Teflon coating. Alloy blade with high quality welding, stable quality, high efficiency. Constructed of carbide, great replacement for your old one. Specification: Material: Carbide Color: Yellow Shaft diameter: 8 mm Package includes: 6 * Clean the bottom cutters Note: Please wear good protective measures when trepanning, damage to the eyes in the event of wood chippings. Size for manual measurement, there may be an error of 0-5mm, belongs to the normal phenomenon.