Cartridge Solvent 10punk9
... consists of break-resistant, high-quality polycarbonate and a webbing made of polypropylene.
If you have difficulty screwing or screwing your cartridge from your air rifle/gun, this release aid is a handy tool for relief.
The loop is simply pulled around the cartridge, the lever then stands up with the edge on the cartridge (in between the belt). Due to the pressure on the good belt/lever, the cartridge can be easily tucked or loosened.