fine impact stud mill Unit has (1) rotary disc 13.6" (340mm) dia w/(136) 1/4" studs; (1) stationary disc w/(200) 1/4" studs. Vibrating pan feeder with 1/2 HP (0.39 KW), 3/50/500 volt, 2250 rpm motor. W/(1) spare pin-disc set. (1) set of beater discs. Unit is similar to Alpine UPZ mill.