Single speed gearbox with 540 rpm PTO •Rotor revolution 290 rpm •PTO shaft with shear pin (1" 3/8 Z6 tractor side yoke) •PTO shaft with slip clutch (optional) •Leveling bar (optional) •Round blade-holders •2 blades per rotor •Strengthened 6mm housing transmission • high strength steel •Cat. I (Models 1300-1500) • Cat. II (Models 1800-2000) •3 pt hitch •Hitch will offset •Side dampened protection •Depth control by 15" cage roller with pin adjustment