Type of Constraint
A ball and socket constraint will attempt to line up the pivot positions in each body, and have no restrictions on rotation
A distance constraint will attempt to keep the pivot locations within a specified distance.
A hinge constraint will keep the pivot positions aligned as well as two angular axes. The remaining angular axis will be free to rotate.
A lock constraint will attempt to keep the pivots completely lined up between both bodies, allowing no relative movement.
A slider constraint allows bodies to translate along one axis and rotate about the same axis. The remaining two axes are locked in place