Klabb F12 24 inches Line Connects Kitchen Sink to Water Supply, Braided Faucet Connector with 1/2 in x 3/8 in Brass Nut, Stainless Steel (Pack of 2), 2 Count

Plumber that installed thought they were well made and convenient to install with the plastic “finger” wrenches supplied.

The yellow plastic part on each tube made my installation so easy. You twist around the nut it fits on both ends and easily tightens.

I needed new supply lines under the kitchen sink because my old ones were too short for the new setup, so I picked up this 24-inch supply set. I just put them on, and I'm stupidly excited by that wrench-nut-thing that's attached. You don’t have to work your own wrench up into a narrow space because you get this tool on each line: the tabs on the sides for your fingers let you hand-tighten all the nuts pretty sternly. The top of it fits the 1/2” nut on the base of the faucet threads; the bottom of it fits the 3/8” nut going to the shutoff. (The set also comes with two 3/8-1/2 adapters.) I don’t have the sink's drain reinstalled yet, but I wanted to test the line anyway; I had a single leak, which I dealt with immediately with the wrench-nut-thing, and now everything is solid -- joins and nuts both. The plastic wrench-nut stays on the line after it's installed, which means I can't misplace it or lose in the interim should I decide to swap out this faucet later. I’m just so pleased with this set of supplies. They were exactly the length I needed, and they came with everything I could have potentially needed to put them on. Plus that wrench-nut-whatever-it's-called is amazing.

Quality is great! I just cant install it since the other items does not work well with my set up

Excellent replacement for my old deteriorating plastic supply lines. Perfect and easy ending for what had been a nightmarish repeatedly leaky beginning. The spanners are very useful for tightening securely. Materials are truly premium and the threading is perfect and well protected.