Plain or Ball Bearing hinges are another form of mortise hinge. They're a popular choice for commercial and residential doors and are a plain, simple design. They're commonly seen on internal doors, however also have an outside use for opening and closing trailers.

Commercial heavy duty door hinges are specialized hardware designed to attach multiple heavy objects to a door and thus stabilize how they turn. They are most commonly referred to as heavy duty, ball-bearing hinge, or heavy-duty ball bearing hinge.

A heavy-duty door handles is one of the most useful components for your front door, and there are a variety of styles available. The heavy duty style will be made from high quality stainless steel that will endure a lot of wear and tear.

The purpose of using a UL-rated door hinge is to ensure that when the door actually swings open and shuts the door and hinges are in fact opening and closing with full, and proper security. There are four different types of doors, including roller, sectional, casement and Bahama.