Shredder has 24 free-swinging reversible hardened steel hammers. Chipper has hardened, special steel blade on heavy flywheel. Hopper opening is 18in. Screens include 1in. standard bar; and 1/4in., 1/2in., 3/4in. perforated as options. Includes PTO shaft and fits all Category 0 & 1 tractors having a 1 3/8in., 6-spline PTO with clockwise rotation. 2-year consumer, 90 day commercial. Truck Ship. U.S.A.