Brand New Planer knife set. Carbide knives offer the hardest metal available and more than 1,000% longer run time than M2-HSS. Carbide is normally used for problem hardwoods Teak, Maple, Hickory, etc. , engineered woods like MDF, LVL, edge glued stock, and glue bonded fiberboards. Carbide is roughly 89+ Rc and must be ground with […]