The patented FlexiWheel with its unique micro frictional surface, uniformly removes a microscopic layer within the buffer zone. Process repairs scratches to renew the disc"s protective layer. Works gently enough to repair the same disc multiple times. Accessory kit contains everything you need to repair up to 25 additional discs. Includes Skip Dr rejuvenating fluid, blue drying cloth, Clean Dr Disc cleaning solution and felt buffing square