With the OP/TECH USA SYSTEM CONNECTORS, the camera/binocular owner has several connection options. The EXTENSION CONNECTORS allow photographers to add an extra length to each side of an OP/TECH USA strap. The quick disconnects snap into place in an instant to modify the length of a strap. They also work great with Uni-Loop? Connectors for a creating a standard-length strap. They can be removed just as quickly to allow for complete flexibility in carrying options. Extensions are available in pairs and in two sizes: Regular (7.5" to 11") and X-Long (10.5" to 16").