I have a rental that has that cheap big box store 1/2 drip tubing for which they sell imitation mexican finger trap couplers for that you just slip the tubing in. They just don't work for me. This coupler lets me switch a run over to bigger stronger dripworks tubing and finish up knowing the joints are tight and won't come apart. Their raindrip coupler is my other tool, when the tubing has been cut (like an oops with the electric hedge trimmers) to cut, insert coupler, twist a few turns with both hands and bam, fixed forever. Great products!