For all types of grass seed and can be used to apply fertilizers and granular products. Large, smooth operating zinc cast gears, no lubrication required. Oscillating shuttle breaks up clumps. Unique hopper design assures that all material will be broadcast. Control flow lever with infinite settings. Heavy Duty Nylon bag with zipper closure comfortable shoulder strap, resists tearing and rotting. Positive On/Off. Molded handle for safety, guards against fingers touching distribution spinner. Metal gears.