ITEM NAME:Steel Louver Slat Woodworking Cutter Milling Router Bit- Medium -1/2'' Shank Description: - Design Anti-kickback - Balance +/- .003" tolerance (allowing smooth operation at high RPMs) - Body Solid Hardened Steel - Blade Industrial grade micro grain car.Cutter CNC ground to a 600 grit, mirror-like finish. - Coating Baked on heat resistant coating prevents build-up of sawdust, resin, and pitch. - Selection of high quality alloy blade,make blade more sharp and durable.