This 5" (12.7cm) steel baby 5/8" (16mm) pin is designed to be mounted in a grip head or grip arm, allowing a few inches to stick out of the head where a light fixture or any other accessory with a baby receiver can be mounted. The combination of a grip head and grip arm offers flexibility in positioning light fixtures or any accessory with a baby receiver virtually anywhere. The end collar serves to secure light fixtures or accessories by preventing the pin from slipping through the grip head in case of unexpected loosening. Knurled recess machined in the pin gives better grip. Additionally, the 1/4" and 3/8" threaded sockets provide extra attachment points for lighting accessories.