The utility sling duo offers rapid access to two pieces of gear while maintaining the security of a strap worn across a single shoulder the utility sling duo comes with four of optech usas exclusive uni loop connectors most cameras will only need one but for cameras with a third strap connection point or when used with a battery grip a second uni loop will be used the gear hangs securely at the sides and will glide up and down the sling without interfering with a cameras tripod connection