We mainly use 4-way screw. 1-way screw have a single groove that forms a spiral, while 4-way screw have four grooves that form a spiral. Therefore, a small amount of rotation can produce a quick and large vertical movement.

Generally, multi-joint screws are often used when threading a thin cylinder such as a fountain pen, because the larger travel distance per revolution of a single-joint screw in a cylinder causes the groove width to increase, which may result in insufficient strength.