Twin Spring Coupling patented new flexible coupling unit is a high speed high torque, and highly flexible coupling. It contains no moving parts, no internal bearings or components, requiring no maintenance. The multi directional coupling allows for working angles up to 40 degrees, and since it is made of two counter wound springs can take shock force without damage. Replaces Servo, Beam, Bellows, Elastomeric, flexible shaft couplings and Universal Joints. No internal components means it can run in high heat and hostile work environments that include water, dirt and dust.