The GraverMeister is the original invention that was patented as a technological breakthrough in power engraving tools. This machine is an air tool that makes its own special air pulses; no external compressor is needed. A foot pedal allows variable power instantly while working. The impact rate is adjustable from 1600-2400 impacts per minute. With the GraverMeister, engrave deeply in steel and delicately in gold, carve wood effortlessly, set large and small stones with confidence, texture metal quickly, sculpt stone, and more. Includes built-in compressor unit, and foot control. 110 V model only.