Permanently marking your valuable is the best way to deter theft or prevent mix-up and loss. No special skills are needed to use your Lenk Engraving Tool. It is the most convenient way to mark your valuables. You can make your identification marks permanent on wood, plastic, aluminum, copper, brass, ceramics, stone, iron, glass and other materials. Markings will not fade, smear, or erase. Adjustable reciprocating motor - 7200 strokes per minute. Includes: 120 VAC, 60Hz Engraving Tool, Tungsten Carbide Tip, (2) Templates, User Instructions.