Finished with a Rough Buff Polish, the Hell Raiser skids easily through the front and midlane with a very quick response to friction on the backend creating a highly angular motion that rips through the pins on medium oily to oily lane conditions. The DV8 Hell Raiser 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.