With the OP/TECH USA System Connectors, the camera/binocular owner has several connection options. You can buy an extra set of connectors to customize the strap to best suit your needs. Straps can be lengthened to be worn across the chest or shortened to be worn at chest level. Another feature of the System Connectors is the small carrying handle created when the quick disconnects are latched together. Extensions are the handy way to add 7.5" to 11" of length to an OP/TECH USA strap. They also work great with Uni-Loop connectors for a standard-length strap. Each Extension has one female and one male quick disconnect which clip into the quick disconnects of your existing camera strap.