Astro Pneumatic's disconnect tool set allow the best and quickest way to disconnect spring lock couplers and separate fittings on fuel lines, fuel filters and fuel tank return lines. The quick disconnect coupler tool slides down the line and into the connector separating the clip apart without damaging the quick connect seals allowing removal of clip. Also separates automatic transmission oil cooler lines on Ford Taurus and Escort with AXOD and ATX transmissions. Set sizes includes: 1/4", 5/16", 3/8" and 1/2" disconnect tools.