Sold individually, this standard "knife edge" hinge post has a 3/16" threaded shaft and uses a 3/32" allen/hex key to drive into place. It screws into a 9476 Standard Post Anchor. For a short time in the early 80's, phillips head, bubble necked posts were made. This would be the correct replacement for that type of post also.
Fits Kahler 2500/2520 Traditional, 2710 Killer (2700 Series) and 2720 Spyder tremolos.
Posts come in 2 sizes, depending on which mounting option was used to mount your bridge, you may need the 9496 Large Post instead which has a 5/16" threaded shaft.