The SMarT Star Horizon was designed for sanding and polishing all types of bowling ball coverstocks including; reactive resin, urethane and plastic, using a 3/8″ variable speed hand drill* and the SMarT Orbit Rotating Ball Holder. Hook and loop fasteners allow for quick changes of 6″ Abralon and SiaAir abrasive pads. A Terry Cloth Bonnet slips over the SMarTStar for polishing. Slip the “Soft Touch” rubber knob over the custom shaft and you can make fast surface adjustments at the lanes during practice. With the SmarT Star you can revive “dead” bowling balls, resurface and refresh your current arsenal and change the balls reaction to match up to lane conditions. Maintenance is the key to success! See Why Bowling Ball Maintenance! (copy & paste ) this link: https://youtu.be/hpIoozNqLuI. The SMarT Star All-in One includes these accessories: SMarT Star Sanding and Polishing Tool SMarT Orbit Rotating Ball Holder (6) Abralon Abrasive Pads; Grits; 360, 500, 1000, 2000, 3000, 4000 (2) Custom Terry Cloth Polishing Bonnets (1) Soft Touch Rubber Knob 16″x16″ Micro Fiber Towel, Ball Maintenance Log Sheet & Instructions *Drill not included