Instruct: Classify an Amazon review as either positive or negative.
Query: Excalibur Surving Wax

I purchased Excalibur Serving Wax for a crossbow of mine soon after I bought the bow. When applied to the strings the wax saves the shelf life of the strings by keeping them from fraying. The wax is kept in a plastic container with a attached lid making it easy to acess and carry in a pocket if needed. I suggest Excalibur Serving Wax for anyone serious about using crossbows.