Finished with a 4,000 grit Siaar Micro Pad Finish, the Marauder Madness is clean through the front, digs in the midlane to create a very strong and continuous motion that drives through the pins. The Class 5G coverstock maintains proper grip throughout the lane on mediumoily to light oil lane conditions. The DV8 Marauder Madness can be drilled using the standard drilling techniques developed for bowling balls with symmetric 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.