This 4-1/2" Mini Track Saw is one of the most versatile saws you'll ever own. With the four included blades, it can cut a huge variety of materials. The 20-tooth carbide-tipped blade cuts wood and wood-based material. The 40-tooth carbide-tipped blade cuts soft metals (aluminum, copper, brass, etc.), melamine panels, and plastics. The abrasive blade/disc cuts steel. The diamond-tipped blade cuts tile, slate, brick, stone, concrete, etc. An optional 24" track (model T10825) can be purchased for use with this saw. The optional track has a non-slip backing on the underside for secure grip on the workpiece, and the top of the track features a guide rail that fits directly into the grooved saw bottom, allowing the saw to slide smoothly and precisely along the workpiece in a perfectly straight line. Another awesome feature of this saw is its plunge-cutting action, which allows you to easily make window, electrical, or plumbing cut-outs in panels without being required to lift and hold the guard out of the way, such as with a regular circular saw. This saw is also equipped with a dust-extraction port that connects to a regular shop vacuum to help keep your worksite cleaner. Specifications: Motor: 120V, 1.5 HP, 10A * Arbor speed: 12,000 RPM * Max cutting depth at 90°: without track 1-1/4", with track 1-1/16" * Saw blade: 4-1/2" x 7/8" * Distance between saw blade and wall: 3/4" * Dust port diameter: 1-1/2" * Weight: 7 lb.