Original Equipment Shaft Key #M133474
Ztrak models: 717, 717A, 727, 727A, 737, 757, 777, 797, 997, Z997, Z425, Z435, Z445, Z525E, Z535M, 535R, Z540M, Z540R, Z625, Z645, Z655, Z915B, Z915E, Z920M, Z920R, Z925M, Z930M, Z930R, Z945M, Z950M, Z950R, Z955M, Z960M, Z960R, Z970R, Z997R
This is a genuine part.