Sturdy step stool is rugged enough to support 350 lb. The molded-in, no-slip surface prevents falls. Four retractable, nonmarking casters and an antiskid bottom make the stool easy to maneuver and hold it in place. Square edges allow flush contact with shelving and cabinets. Step stool offers two levels and is made of structural plastic, which is thicker and sturdier than standard, injection-molded plastic.