New Vindicator On-Off Safety Valve Handle for Scuba Diving Tank Valve Handle - Model #2 Fits Thermo, Sherwood 4000, Sherwood 5000, Dacor, Catalina, OMS & PST Valves

Swapping the valve was quite easy, but keep in mind you will need a notched driver to remove the screw. I ended up ordering one for a few dollars more from Vindicator as the one that I had in my dive kit emergency tool wasnt long enough with the multi tool handle to really get in there and tighten the handle on. Much better value than replacing the entire valve. I did have to take the handle off once to make a minor adjustment because the first time I put it on when the handle was all the way open it still showed red. But it was a simple adjustment