Hydraulic cylinders are actuation devices that use pressurized hydraulic fluid to produce linear motion and force. They are used in a variety of power transfer applications, and can be single or double action. They transmit force and motion through the use of hydraulic fluids. Hydraulic systems amplify a small input force into a significantly larger force, which is an important feature for heavy-duty tasks like lifting heavy objects in construction, controlling high performance vehicles, or bending metals in metalworking.