Featuring the new Class 9 Hybrid Reactive coverstock wrapped around the Nightmare core, the Endless Nightmare skids through the front gripping the midlane and turning over on the backend for the most total hook potential of any DV8 ever on medium to oily lane conditions. The DV8 Endless Nightmare can be drilled using the standard drilling techniques developed for bowling balls with asymmetric cores. To reduce oil absorption and remove dirt from the surface of the ball, clean your ball with a cleaner designed for reactive bowling balls. Look. We don't screw around. DV8 bowling balls have been manufactured to the highest standards of workmanship and material. We warrant that they'll be free of defects in materials and workmanship for a period of two years from the date of purchase. We agree to repair or replace the ball you bought if at any time during the warranty period it's found to be defective in material or workmanship.