Mainly used for the engraving and marking of wood, MDF, acrylic, stainless steel, aluminum, brass, medium density fiberboard, wood panels, plastic and many other soft gummy materials. Works well with spring loaded engraving tools, CNC milling machines, collets, end mill holders and top loading engraving machines etc. The craving router bit are made of tungsten steel, which offers better cutting strength and premium drilling outcomes than other ordinary carbide steel craving bits in the market. for lasting longer than other engraving tools when engraving metal. Maximum tool performance.