There are not many scuba specific tools I find more useful than this one on eBay.
It's not my auction, but if you have Conshelf 2nd stages to adjust this tool sure beats wedging a screwdriver against the poppet to prevent it turning when setting lever height.
Aqualung Scuba Service Tool US Divers 4 Prong Poppet Wrench Tool | eBay
It's not my auction, but if you have Conshelf 2nd stages to adjust this tool sure beats wedging a screwdriver against the poppet to prevent it turning when setting lever height.
Aqualung Scuba Service Tool US Divers 4 Prong Poppet Wrench Tool | eBay