The Dual Gauge Shotshell Case holds 25 magnum (3.5") shotshells, 10 or 12 gauge, in the down position. The latch has been designed to be opened easily, even with gloves, and has a mechanical hinge. The 10 gauge shells fit tight and will loosen up after a few uses. This case can also be used to organize some brands of 12 gauge choke tubes with a maximum length of 3.1".