The John Deere R309356 Sway Block is an authentic OEM component designed for various John Deere agricultural tractors. This sway block, often referred to as a lock-out sway block, plays a crucial role in stabilizing implements attached to the tractor's three-point hitch. It helps to prevent excessive lateral movement (sway) of the implement, ensuring consistent performance and improved operational control during field work. Manufactured to John Deere's rigorous standards, the R309356 provides reliable fitment and durability, essential for maintaining the efficiency and safety of your machinery.