A small but mighty abrasive accessory, 3M Unitized Wheel Mandrels secures Scotch-Brite Unitized Wheels (sold separately) to a rotary tool with a ¼” collet (such as a die grinder) for edge deburring and finishing.

The 3M™ Unitized Wheel Mandrel 931 secures a small Scotch-Brite™ unitized sanding wheel to a rotary tool such as a die grinder for edge deburring and finishing applications. The shank is 1-1/2" long and holds a wheel (sold separately) that is 1/8", 3/16", or 1/4" thick, with a 1/8" center hole. The 1/2" diameter flanges fit on either side of the wheel and are secured with the retainer nut. Max RPM is 13,000. Note: A 5/16" center hole is recommended for wheels 6 density or harder.
For more than a century, 3M has applied innovation and technology to improving our customers' lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. Abrasive Systems products, including a complete line of coated abrasives, microfinishing and microreplicated abrasives, and hardware accessories, provide the finishing touch for almost any surface conditioning application. The 3M brand, across thousands of products, represents consistency, superior quality, and value.