SPECIFICATIONS Farm King Finish Mower - Heavy Duty Series Model 555 Catergory 1 - 3 Point Hitch Style Cutting Width: 60.0 in Cutting Height: min. 1.5 - 5.5 in Blade Tip Speed: 15829 ft/min No. of Blades: 3 Spring Steel Blade: 1/4" x 2.25" heat treated Gearbox: Closed 540 rpm Gearbox Rating: 1:1.93 Tractor Required: 15 -55 hp PTO Shaft: Shear Pin Weight: 627 lbs