It screws in from the side with a small flat screwdriver. Be sure and loosen the saddle lock screws before you attempt to remove the pin, and don't forget to tighten them when your done.
Length: 0.0000 in Width: 0.0000 in Height: 0.0000 in Weight: 0.200 oz Packaging: 0.0000 kg Units in box: 1