Check the listing for details. Jockey Box Coil Shank and Faucet Kit - 3/8" Coils - Self Closing Faucet Upgrade. Condition: New. Listed at 45.49 USD. Shank : This connects the faucet to the jockey box and serves as a secure passageway for beer to flow out. Coil : Stainless steel coils (part of the kit) are installed inside the jockey box. Beer flows through these coils and is chilled to the desired serving temperature.