Metal Universal joints, can bend any angle (the rotation angle of 45 degrees), universal joints at any angle can change the transmission direction. Originally a motor shaft is toward the south, connected by a universal joint, the direction of the axis of rotation can be changed toward the ground. Isolate or absorb axial vibration and shock, having a large torque, small inertia drive, adjust the angle, easy installation, wide application range, long life and other significant advantages for a variety of general machinery applications.