6 Bottom Cleaning Drill Bits with 8mm Shank, Size: 8x18; 8x20; 8x22; 8x25; 8x30; 8x32. Solid hardened steel body with anti-kickback design, build-up and heat resistant Teflon coating. C3 micro-grain tungsten carbide burrs, double edge cutting design, excellent concentricity. Ideal woodworking tool for cutting all composition materials, plywoods, hardwoods and softwoods. Package includes: 6 bottom cleaning bits. Features: C3 Micro-Grain Tungsten Carbide Burrs. Strong hardened steel body with anti-kickback design. Teflon coating resists buildup and heat. Alloy blade with high quality welding, stable quality, high efficiency. Cemented carbide construction, durable replacement for worn bits. Specifications: Material: Cemented carbide Color: Yellow Shank diameter: 8 mm Package includes: 6 x Cleaning router bits Note: When drilling, wear proper protective equipment to prevent injury from flying wood chips. Dimensions are manually measured and may vary by 05 mm, which is considered normal.