We've occasionally found our CAT5 reel not long enough to route from FOH to stage, this solves the problem. We use this with a Behringer X32, and the connection is rock solid and dependable, as expected from Neutrik. Will easily survive being thrown in and rattled around in a road trunk/case.
Quality is great as expected from Neutrik, you could not get one petter than this. Fits Ethercon and also ordinary RJ45 connections. I have always one in my gig bag. Must have for all audio-video-lighting technicians on the field. Have had no problems even when extending delicate audio cat 5 cables.