The SP-7220 by SP Air Corporation is a 1/4″ heavy-duty straight die grinder. An ergonomically designed cusion-grip handle provides added comfort during operation. The unit comes equipped with a rear exhaust, a built-in power regulator, a safety throttle lever, a direct drive motor and a graduated trigger. Unit specifications include a free speed of 20,000 rpm, a required air pressure of 90 psi, average air consumption of 4.0 cfm, an air inlet size of 1/4″,