Uwatec Aladin QDC Tool Kit #20-325-100. Used to service/repair/rebuild SHERWOOD/OCEANIC/AERIS/SCUBAPRO/UWATEC QDC (QUICK DISCONNECT COUPLER) TOOL KIT. I used it to succesfully service the QD on my wife's Oceanic Pro Plus 2 computer. I don't need it anymore. With this tool you can completely disassemble, clean, and replace all the o-rings in the QD. I'm including a few packs of o-rings that I used the do the rebuild. I ended up ordering a few different sizes, since I wasn't sure exactly what size I needed. $20 plus shipping (should be ~5$). Sorry, US sales only.