This is the auto closing spring for Intertap faucets.
This spring forces the tap handle back to the closed position when you let go.
Installs easily into the back of the faucet and gets compressed between the shank and faucet, keeping tension on the handle to force it closed.
So far this spring appears to work with both our stainless and chrome shanks, however it can't be guaranteed to work with all shanks.