Safariland Shotgun Shell Holder provides up to 6 shotgun shells when you need them most. This shell holder is designed for 3 inch 12 Gauge ammunition. All of the shotgun shells in the holder can be deployed at once, for the best and fastest possible loading. There are metal tension devices that are used to retain the shells in the holder. You can change use between 3 inch and 2.75 inch ammunition with the use of internal spacers.