Features of Double Cylinder Grabber ①360-degree hydraulic rotation, providing more flexible grasping effect. ②The oil cylinder has a built-in balance valve, which runs smoothly, maintains the clamping force, and is safer. ③The two-way relief valve and two-way balance valve of the motor prevent the motor from being impacted by hydraulic pressure. Features of single cylinder wood grabber ①360-degree hydraulic rotation, providing more flexible grasping effect. ②Simple structure, light weight and large grasping force. ③The connecting rod ensures the synchronization of the two grabs. The cylinder has a built-in balance valve, which runs smoothly, maintains the clamping force, and is safer.