Quick Connect Fitting Tool for Reverse Osmosis (RO) and Drinking Water Filters - 1/4" AND 3/8" Makes removing quick connect fittings quicker and easier Handy in tight spaces or where minimal tubing is exposed Works with John Guest, Mur-Lock, DM, Speedfit, and many other brands of fittings Works on both 1/4" AND 3/8" fittings