I've had the opportunity to use many different belt sanders over the years. This one is hands down the best one you can buy. Superb engineering, and design, coupled with flawless manufacturing produces this gem. You simply can't go wrong with this sander. I especially like the variable speed feature. This thoughtful feature makes it possible to adjust your at load speeds which helps with softer material. An architect friend and I have used these sanders on many materials including wood. The 3X21 model is this boys little brother, which I found to be a benefit when I need to work upside down. If you're looking for a belt sander, this one will keep you happy.