A Steel Hopper is stronger than polyethylene hoppers. They have a smooth, formed edge around the top for durability and the interior seams are welded for strength. Release the locking latch and these perfectly balanced hoppers dump their load. They automatically return to an upright, locked position. It is ideal for many industrial cleanup and waste control applications. Hoppers used in manufacturing settings are usually made from metal or steel. The steel hopper is made available by us for commercial applications.