The new GraverMax G8 is an upgraded model of the previous GraverMax (#004-980). This model is based on the original GraverMach (#004-960). This engraving system gives each handpiece excellent range of power with perfect control throughout an expanded range of impact speeds. The GraverMax G8 features 400-8000 strokes per minute, a throttle bias adjustment valve for tailoring throttle response, and a dual-stage precision air regulator. Advanced ergonomics include front air pressure adjustment, Quick Connect air couplings, rear mount throttle connection, and an advanced valve pulse unit that operates with virtually no noise or vibration. The GraverMax G8 has connections for two impact handpieces and an auxiliary air connection for other air tools, including the GRS ultra 850 Rotary handpiece. Handpieces and tools sold separately. All Standard Handpieces are compatible with this machine. Airtact compatible (sold separately).