I occasionally find myself wanting to open up the poppet valve on a disconnect -- for example, when I disconnect a keg and want to let the residual beer in the line drain out through the tap before disconnecting the line.
This can be done by hand, but it's not the most comfortable thing in the world (especially if you have to do it a few times). Hence, this thing.
This was designed for a ball lock cornelius keg fitting.
Print upright (widest edge on bottom).