Ideal for identifying and personalizing your valuables as well as decorative engraving. At 7,200 strokes per minute, the 115 volt motor and carbide point do more than just scratch the surface. Stroke adjustment dial on tool regulates engraving depth, from fine lines to deep grooves. Get the performance you need to engrave on metal, plastic, glass, ceramic, wood and even leather. Setting the dial at 1 through 3 engraves soft materials such as wood and leather.