Simply add this adapter in between your tap and shank, then you can adjust the flow with an allen wrench.
Once adjusted, the flow is locked in and cannot be accidentally changed.
Turn the middle ring to adjust flow restriction.
Turn the middle ring to adjust flow restriction.
Open your faucet to test the flow restriction and make further adjustments if
needed.
Once the desired restriction is dialed in, retighten the top and bottom screws.