The Astro 223K Air Belt Sander is a versatile tool designed for smoothing and contouring surfaces, especially in hard-to-reach areas. With a belt size of 3/8" x 13" and a free speed of 20,000 RPM, it promises efficiency and precision.

Users have mixed experiences with this sander. Many appreciate its performance, with one user stating it's their 'go-to sander' that lasts about six years with moderate use. However, some have reported issues with the belt mechanism being weak and bending easily, which may affect longevity.

A common complaint is the clamp that locks the belt angle, which tends to slip under pressure. Some users suggest fabricating a modification to fix this issue. Another point of contention is the small end roller, which wears down quickly. Replacing it with a metal roller significantly improves performance.

Price is another factor; one user noted that the same sander is available elsewhere for $29.99, making this seller's price seem high. Despite these drawbacks, when modified, the sander performs well and offers good value for money.

In summary, the Astro 223K Air Belt Sander is a capable tool with some design flaws. If you're willing to make minor modifications, it can be a reliable addition to your toolkit.