A clamp cylinder is a cylindrical pneumatic or hydraulic tool for holding a clamped or unclamped state. This product is used widely for the alignment of electronic parts or liquid crystal glass, or at fine particle worksites. A wide variety of types are available, including those with different widths or sizes according to the object to be mounted. Square shaped rotary clamp cylinders are commonly used, after being secured with a though hole and tap or clevis. Operation methods include home position swivel, moving swivel, swing and straight stroke. Select the operation method according to the application. A clamp cylinder is an essential tool for the clamping and unclamping operations of various devices. Therefore, a long lifespan, excellent durability and high safety levels are required.