1、[Main Purpose] Engineered specifically for wood door hole opening and bottom cleaning, our router bit promises professional grade results each time. 2、[Precise Cutting] Our cleaning bottom router bit delivers precise cuts, ensuring smoothly surface without burrs on your workpiece. 3、[Long Durability] The grooving router bit is made from carbide, ensuring a lasting lifespan even with frequent usage, ideal for long term use. 4、[Threaded Design] The lock milling cutter features standard M10 thread for easy connectivity with handheld drills and other tools, adding convenience to your woodworking tasks. 5、[Versatile Usage] Suitable for both home DIY enthusiasts and professional woodworkers, this milling cutter bit makes woodworking more enjoyable.