The Chicago Pneumatic CP74 Series Pneumatic Die Grinders are designed to optimize productivity and operator comfort. Delivering up to 20 percent more power than the CP91 range and with a collet design for quick and easy burr changes, the CP74 pneumatic die grinders can help optimize productivity in metal fabrication applications, as well as vehicle servicing and repair. The CP74 Series of 1/4” and 6mm pneumatic die grinders offer six different heads, including short/long and straight/angle (120 degree, 90 degree). The die grinders operate between 22,000 and 28,000 rpm depending on the model. With the smallest grinder in the series weighing 1.1 lbs and the largest grinder 2.43 lbs.