Coupler

RJ45 couplers and punch-down junction boxes for Cat5e and Cat6, in inline, right-angle, crossover, and shielded versions.

Couplers join two patch cables when a run comes up short, and the keystone latch lets them mount into a plate or panel instead of hanging loose. Two things worth knowing: every coupler adds insertion loss, so count it against your channel budget rather than treating it as free; and a crossover coupler swaps the pairs deliberately, so keep it out of the box on modern auto-sensing equipment. For a permanent join, a 110 punch-down junction box is the better answer.