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", and a hose size of 3/8". SP Air Corporation is a manufacturer of high quality pneumatic tools with over 30 years of experience. SP Air Corporation's distribution extends to over 40 countries worldwide. People buy our tools because they have an excellent reputation for getting the job done. We understand and appreciate the value of your business. That's why we have made it our mission to provide you with reliable, quality pneumatic tools. For more than 20 years, we have provided our products and quality customer support for many automotive and industrial clients.