These posts are used for tall moon clip holder frames. They are 3.75 inches tall and are used to hold 2 loaded moon clips.
They come in diameters of 3/8" 7/16" 1/2" 9/16" and 5/8". Match the diameters to the center opening in your moon clips.
Included is a screw to attach to the moon clip holder frame.
These taller posts are good for 38/357 and you can stack up 3 Short Colt moon clips.