GRS Tools 004-895 GraverSmith. This engraving system offers basic work capability and pneumatic impact power for stone setting and engraving. It is ideal for production stone setters, multiple factory installations, and individual craftsmen on a budget. This system 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. Stroke speed ranges from 400-8000 strokes per minute (SPM). Handpiece sold separately.