Easy wood tools Ci2-SQ carbide cutter. Easy Wood Tools uses the best tungsten carbide. 1) THE RIGHT VARIETY: Carbide is essentially a blend of tungsten powder and carbide powder. The ratio of cobalt to tungsten and the size of the tungsten particles are collectively referred to as "varieties". There are literally hundreds of conceivable varieties, and no carbide grade is suitable for all applications - whether for cutting wood or metal - the perfect combination of cobalt and tungsten in EWT Carbide results in a knife that is both sharper and more durable. 2) The right cut - All cutters on the bottom on CNC machines with diamond discs to the flattest and truest surfaces. THE RIGHT GEOMETRY EWT grinds all cutters to the right angles and geometries that are particularly suitable for turning wood for any difficulty.