Rail Lube and String Wax Features The Bear X Crossbow Rail Lube and String Wax helps reduce friction and protects crossbow strings and cables. Rail Lube and String Wax Specifications Maintenance:Reduces Wear And Tear Of Crossbow Strings By Protecting Crossbow Strings And Cables Long Lasting:Reduces Friction To Help Prolong The Life Of The String Scent Free:Scent-free Formula Special Formula:Specifically Formulated To Prevent Corrosion Accurate Dependability:Engineered For Top-of-the-line Speed Extreme Accuracy And Dependability