• Premium aluminum oxide abrasive for long life • Heavy, durable X-wt. cotton backing makes these points durable and flexible • 80-120 grit for deburring, blending, cleaning and applying a light scratch pattern • Excellent abrasive product for breaking edges • Recommended mandrel is M-21 • All cartridge roll part numbers shown are resin bond, half-glued • Quarter and full glue are also available for quotation • Cartridge are strips of abrasive cloth rolled and glued to form a solid shape that is designed to break down during use and reveal the next layer of abrasive. There are mounted on a mandrel and used on high speed grinders on inside surfaces and inside corners where other forms of abrasives cannot reach.