Hi SK sharma.
Thank you for your comment. As I meant, I looking for the gripper without using pneumatic. It's look like using rack and pinion for open jaws of gripper. When the hand_roller was move by pneumatic cylinder, it will open gripper, and close when cylinder return. The system is using pneumatic, but the gripper is non. I also known about pneumatic gripper, but when using pneumatic gripper, have to use rotary air connect system for it, because the table will rotate and take the gripper rotate together.