This is a tool for people with a double barrel shotgun. With this Tool you can have two shotgun shells attached to: 12 GA SHOTGUN SHELL FINGER MOUNT so that when you "break open" the shotgun to reload, you do not have to pick them up from the cartridge belt or pocket since you have two shotgun shells ready on the: 12 GA SHOTGUN SHELL FINGER MOUNT.
Be sure to measure / check the distance between the center of the shotgun shells.
This Tool has a center distance between shotgun shells at 36 MM
I have not printed this model so I'm not sure how well the shotgun shells are attached in 12 GA SHOTGUN SHELL FINGER MOUNT.