This scatter box spreader has an easy on-off-flow rate adjuster, is light weight and easy to use. It can be used as an all-purpose applicator for fertilizer, seed, granular insecticides, ice melts & fire ant baits. It is made of polypropylene and one knob does it all; fertilizer, seed, granular insecticides. Comes with a handy rate application chart. All purpose applicator for little and big jobs. This spreader is rust and corrosion resistant.