This tool allows you to easily release a PTFE coupler with one hand! The specially designed pliers slide around the coupler, then squeeze to release the quick release. Then the tube can be pulled out with the other hand.

Requires 1x M4 machine screw 20 mm or longer, 1x M4 nylon locknut, and optionally 1x M4 washer. Assemble as shown in the last model picture.