Finished with a 2000 grit Siaair Micro Pad Finish, the Hell Raiser Revenge has easy length through the front and midlane with a very quick response to friction on the backend creating a highly angular motion for a matte finish ball that tears 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. All DV8 bowling balls have been manufactured to the highest standards of workmanship and material in the bowling industry, and we warrant that they will be free of defects in materials and workmanship for a period of two years from the date of purchase. DV8 agrees to repair or replace this ball if at any time during the warranty period it is found to be defective in material or workmanship.