Lay-Mor SM400 is a compact sweeper designed for municipal, commercial, and industrial cleanup applications. It is used for collecting dirt, debris, dust, and light litter from paved surfaces such as streets, parking lots, sidewalks, warehouses, and job sites. The SM400 is typically associated with maneuverability, simple operation, and compatibility with a range of host machines or configurations depending on setup. As a Lay-Mor sweeper model, it is part of equipment used for surface maintenance and site cleanup. The SM400 is referenced in sweeper equipment listings, rental fleets, and maintenance operations where efficient debris removal is required.