Fiber cement is a wonderful exterior product, but cutting it with a circular saw can kick up a lot of dust. This 5-inch fiber-cement saw aims to clear the air. The product is equipped with an AIRGUARD system that collects up to 90 percent of the dust during cutting, resulting in a cleaner jobsite and cleaner air. It features 8 amps, weighs 7.4 pounds, and has a bevel that tilts up to 45 degrees. Cost: $199. Ridgid. 800-474-3443. www.ridgid.com.