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This arbor is used with the drums in BlackJack’s #15210 Sleeveless Sanding Drum Set.
We offer this arbor in case you need more 3/8” arbors than provided in the Set. The large end is 1/2” diameter to fit into the drum. The small end is 3/8” diameter.
If you haven’t tried our Sleeveless Sanders, you should. With a Sleeveless Sander you will never be without the correct abrasive drum because you make your own drum using paper or cloth backed abrasive.
Here’s a direct link to BlackJack's #15210 Sleeveless Sanding Drum Set.