Features: The router bits for head are made of industrial high strength carbide material, which provide smooth, clean and accurate cut on various types of wood. Industrial carbide router bits for head with hardened alloy HCS body construction ensures superior wear resistance, even can withstand some heavy duty woodworking. The shank is for all major router machine. Nice performance on soft woods, hard woods, MDF, particle board, acrylic, etc. Solid hardened steel bodies with anti kickback design. Build-up & heat resistant for teflon coating. Bearing: Totally enclosed & lubricated. Hook & Shear Angles: High hook & shear angles allow cutters (C3 Micro-grain Tungsten Carbide) to slice smoothly into stock producing clean, splinter free. Specifications: Material:Tungsten Steel Alloy Size: Approx.14x1.8x1.27cm/5.51x0.7x0.5inch Size: Approx.14x1.8x1.2cm/5.51x0.7x0.47inch Size: Approx.14x1.7x1.27cm/5.51x0.66x0.5inch Size: Approx.14x1.7x1.2cm/5.51x0.66x0.47inch Package Includes: 1x Woodworking Milling Cutter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.