The 5/8" Baby Pin with 1/4"-20 Male Screw from Matthews has innumerable uses on any set. The industry-standard pin has an indent toward the top of the pin to prevent unintentional release. The same area is knurled to prevent rotation. On the bottom of the pin is a 1/4"-20 male screw that has uses such as attachment to a clamp that supports a light on a pole or truss.