The Frontier BB50 Series Box Blades are the ideal choice for John Deere Tractor owners looking to do more work in less time. Equipped with a fixed front and rear blade and replaceable heavy-duty ripper shanks, the Frontier BB50 Series Box Blades are the perfect solution for the John Deere owner. Available in 4 different sizes: BB5060 (60"), BB5072 (72"), BB5084 (84") and BB5096 (96") Visit MuttonPower.com to learn more about the Frontier BB50 Series Box Blades and buy online today! http://www.muttonpower.com/store/c-739-box-blades.aspx