Excalibur Crossbow Serving Wax 49626. For convenience this wax comes in a handy resealable container you can take with you. Specifications for Excalibur Crossbow Serving Wax: Manufacturer: Excalibur Crossbow Additional Features: Serving Wax Fabric/Material: Wax Package Contents: Excalibur Crossbow Serving Wax Excalibur String and Deck Wax will dramatically increase string life by reducing the friction created when firing your crossbow. For convenience this wax comes in a handy resealable container you can take with you.