Our abrasive bands have aluminum oxide resin-bonded to a cloth backing. (Resin bond gives much longer life than glue bond.) These long-lasting, top-quality bands offer chatter-free operation for grinding, blending, deburring, smoothing, finishing and polishing flat and contoured metal surfaces. Use on a drum arbor (sold sepreately) to polish inside tube, class rings, etc. on hard metals. Maximum operating speed: 30,000rpm. Sold in boxes of 100.