The Revolver Joint is a unique type of ratcheting joint composed of three pieces: Two half-spheres and a pin that locks the whole ensemble into place. Both half-spheres have a standardized cylindrical peg, used to connect the different body parts of any given figure.
The friction of the joint gives the figures a wide range of motion and stability, allowing for many dynamic and varied poses.
Originally, Revoltech joints are manufactured in 6mm, 6mm double, 8mm, 8mm double, and 10mm sizes. However, Evangelion Evolution figures have joints that are sligthly smaller than those usually used.