Multi-function Lawn Mower (also known as a mower, grass cutter, or lawnmower) is a machine utilizing one or more revolving blades to cut a grass surface to an even height. The height of the cut grass may be fixed by the design of the mower, but generally is adjustable by the operator, typically by a single master lever, or by a lever or nut and bolt on each of the machine's wheels. http://www.ykaoyujx.com/multi-function-lawn-mower/