Helps blades stay sharper longer. That means you get more for the money you spend on blades, change blades less often, spend more time sawing. Massive construction with 2×3 steel support arm, spring loaded cutter-head, 3/4″ Arbor Shaft, Two 1.5″ Pillow-Block Bearings, 3/4HP Motor and UV-Protected Power-Coat Finish.