For MTD Bolens Huskee White Outdoor Colt XP Zero Turn / Mustang Colt RZT, for Troy-Bilt Colt XP Zero Turn, Mustang Colt RZT. Specs: Description: PTO Clutch, Crankshaft: 1″, Pulley OD: 5.923″; Direction: CCW; Torque: 80 ft. The mower clutch optimizes the performance of the mower deck blades and accessories for high-speed response with improved safety and control.