What Is a Lever Handle Guard? A lever handle guard is a heavy-duty metal or aluminum cover designed to fit over the lever handle or door knob area. Its main purpose is to prevent intruders from easily manipulating the handle to gain entry. The guard typically wraps around the handle, is bolted to the interior of the door, and blocks access to the mechanism that opens the door. The Spartan door cover is a popular brand known for its sturdy construction and simple design. Why L