I have tried to use other fittings for poly and I always get leaks and or they are complicated to put together. I admit I thought this things seamed to simple, and loose when I got it, but when I installed it I was surprised by how tight you could tighten it to make it secure. It had something called a locking collar that twisted onto the tubing and set it in place. Awesome! Works great and allows me to move my water wherever I need it! It's also Made in the USA!