flymolo
Contributor
that being said these odd handwheels do exist (for lola valves anyway)
www.piranhadivemfg.com
though i wouldn't find them necessary myself

Cave, Wreck / Anti-Roll Knob for Lola Valves
These are a special knob for Lola valves! This knob replaces your standard handwheel knob from shutting off while diving on a wreck or inside a cave! We feel this is a great little knob that gives peace of mine while inside a cave or diving on a wreck you now do not have to worry about your...

though i wouldn't find them necessary myself