The Murray 774090MA Lawn Tractor Pulley Splined 7.5 Q1 ensures positive, slip-free rotational torque transmission to maintain consistent cutting deck or drive system performance. This heavy-duty mechanical component serves as a primary drive pulley within the tractor\'s power transmission system. It works by mating its precision-machined internal splines directly with the matching ridges of the engine or transmission shaft, completely eliminating the risk of independent spinning or keyway shearing under heavy loads. As the shaft rotates, the pulley turns the drive belt smoothly through its optimized 7.5-inch outer track. Keep your tools organized and ready with a reliable toolbox and the Murray lawn tractor pulleyfor your next project.