what is the difference between needlepoint and petit point
Needlepoint The degree of detail in needlepoint depends on the thread count of the underlying mesh fabric. Needlepoint worked on fine canvas is known as petit point. Due to the inherent stiffness of needlepoint, common uses include eyeglass cases, holiday ornaments, pillows, purses, upholstery, and wall hangings.[citation needed]
Ball and socket joint The ball and socket joint (or spheroidal joint) is a type of synovial joint in which the ball-shaped surface of one rounded bone fits into the cup-like depression of another bone. The distal bone is capable of motion around an indefinite number of axes, which have one common center. It enables the bone to move in many places (nearly all directions).