Springs expand and elongate to absorb impacts and apply and maintain pressure. Compression springs shorten under loads to absorb impacts and protect against shock impact in mechanical applications. Die springs handle applications with high compressive force. Extension springs are made with different end types for specific applications and are wound with their coils touching when no force is applied. Torsion springs are wound in a clockwise or counterclockwise direction and are used for applications that need a precise rotational and turning motion. Disc and Belleville springs are small, compact round washers in different cuts, materials, and sizes that absorb shocks and vibrations. Constant-force coil springs are tightly wound springs that uncoil and extend to provide a consistent output force. Garter springs have ends that connect to form a circle and provide radial pressure to seal motor belts and electrical connectors. Gas springs produce a pulling or pushing force to lift, lower, or support objects like trunks, hatches, and tailgates. Rotary dampers are mechanical devices filled with viscous fluids that control the rate at which doors, drawers, and lids close.