The new GraverMach AT™ is wonderfully familiar to anyone who uses its predecessors such as the GraverMax, GraverMaxSC, or the original GraverMach. With the expanded capability of precise, selectable hand control, this new power tool is in a class by itself. the hand control technology is based on the GRS Airtact. This advanced (patented) air logic system provides hand power control without adding moving parts to the handpiece itself. The result is a rugged and intuitive way to control handpiece power by hand. When foot control is preferred, it is only seconds away. Just one simple selector knob instantly provides greater control, choice and refinement while working. The ability to instantly change from hand to foot control, as desired, means new creative freedom and reduced stress. Each includes a foot control and air filter, and requires clean, oil-free compressed air with minimum 45 psi (3 bar) pressure and 1.4 cfm (40 liters per minute) flow. Electrical requirements are 100/240 V at 50/60 Hz. All Standard Systems have a stroke speed of 400-8000 strokes per minute (SPM). Handpieces sold separately.