CNBTR Professional 1/4" Shank Carbide Router Bit Set Milling Cutter Wood Case Tool Kit Pack of 15 1/4" shank,sealed bearings,smooth accurate cuts. Set contains a selection of popular bit profiles. All heat-treated blade, with high concentricity and strong refused torsion. Safety instructions: Razor blades permanently enclosed in a cartridge or housing with less than 2mm of blade exposed. The bladed product is not use for people under 18 years. The item is only use for industrial cutting/engraving, not hazardous article. <span class="a-text-bold">Versatile wood router tools:</span> 1/4 inch shank diameter with 15 pieces different router bit meets various needs. <span class="a-text-bold">Easy to use and excellent performance:</span> Sealed bearing roller and accurate 45# carbon steel blade edges ensure cuts super smooth and clean on woodworking. <span class="a-text-bold">Convinient to pick up and storage: </span>Packed with a wood case and attach index for each tools, best for beginners. <span class="a-text-bold">Function: </span>Mainly used for woodworking trimming, puzzling, boring tenon and carving, etc.