Door Lever and Door Knob – Function and Style

Door levers are an essential component of the door opening system and should be chosen well to ensure safety and reliability. Due to many different styles, door levers often pass through the open and closed switch, so you have to know precisely which way your door leans to make sure the lever turns correctly on the door. Here are some essential tips to remember when choosing the right door lever.

Firstly, consider the type of lever used — in terms of extension and pull. Extension door levers tend to have more movement than pull door handles. This is because the extension lever’s interior face can be moved up and down at any time during operation. Some external doors are just one solid panel with a flat top — if this is the case, then the door’s internal workings may not differ from the outer doors, as the internal mechanisms are much more straightforward. If the door handles on these exterior doors swing either up and down independently of each other, the internal tool may be more complex.

Next, take a closer look at the spring arrangement. Spring arrangement refers to how tightly the door lever attaches to the handle. This is generally a one-way bolt, but depending on how the door is opened, it might be possible for a two-way or even three-way spring arrangement. If it is a one-way bolt, then the door lever’s interior side will push against the exterior side of the door handle, and the outer side will push back towards the interior side of the door lever. The internal lever will push the door open if the door lever’s interior side is pushed and the exterior side will push back if the interior side is pulled.


On internal door levers, the door handle and the door lever do not flip, so you only have one option when determining whether to open or close – the interior door lever. If you are opening a door with double frame construction, the interior door lever will be located between the inside edge of the frame and the inside lip of the door frame. The internal door lever is located between the interior door frame and the sliding door stop (if there is one) on sliding doors. These days, with modern materials, door hinges can be mounted flush with the frame’s exterior, eliminating the need for a second internal door lever. If the door is hinged between two frames, the interior door lever is a single-point bolt that turns to lock in place.

On both sliding and bi-fold doors, the door levers and doorknobs are mounted externally. Except on bi-fold doors, they are rarely mounted internally. Bi-fold doors use a system of pulleys and chains to raise the door’s opening by an equal amount each time the door is opened. In most sliding doors, the doorknobs act as tensioners, mounting the door in its closed position until another handle is released. The door levers then rotate the door to an open or closed position.

Today’s door levers and doorknobs come in a variety of styles. There are traditional brass finishes; oil rubbed bronze, polished brass, and more. There are finishes available in Polished Brass, Black Iron Red, Champagne, or Oil Rubbed Bronze. There is solid brass, and pewter finishes available as well. All lever handles and doorknobs are available in different decorative finishes as well, including Chrome, Satin Nickel, Antique Oil Rubbed Bronze, and more.