Features All inserts have a router cutter shaft diameter of 8 mm and are suitable for all milling machines and routers with 8 mm collets for all types of cuts. The edge profiling router has ball bearings. This guarantees professional, high-precision machining of wood. Suitable for use as a template. PREMIUM QUALITY MATERIALS: woodworking cutter set is made of 45 heat hardened carbon steel milling body and tungsten carbide cutting edges for strength and hardness, with heat-treated and heat-resistant Teflon coated surfaces for abrasion and corrosion resistance against sawdust and pitch. Wide range of applications: the miter is suitable for routers and the 8 mm shaft is suitable for grooving and cutting a wide range of materials including solid wood, particle board, plywood, MDF, laminate, plywood density board and various man-made boards. Product Information Product Name: Trimming cutter 4 pieces set Product material: 45 steel and tungsten steel blades Product size: refer to the picture Product color: yellow and silver Packing list: trimming knife 4-piece set x 1 (subject to the main picture) Please note: 1. Due to the long shipping time, the item may be damaged during transportation, if the item is damaged, please leave us a message through the official website immediately before posting a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. 3. The color displayed by different monitors may vary.