Eight hundred fish over the transom in two years and not one malfunction from these releases. Hint: carry a firearms trigger weight scale on your boat. Preset the release at the desired poundage. For me 5lb works great. The big ones self release. For best usage, don't attached to the downrigger cable. Instead crimp a bit of old cable to the ball's tail fin and fly the release on a 18" cable all by itself. Talk about a strike indicator! There is no doubt.
These releases are the ticket when it comes to setting just the right amount of tension for the fish you are targeting. No more dragging fish behind the boat without knowing they are there and a lot fewer false releases. Good product at a fair price.