Why do you emphasize the importance of accurately measuring for your sleeve?
The more accurate you are in gathering the requested measurements, the better The Sleeve will secure your door.
Can I secure the door with The Sleeve if my door is unlocked?
Absolutely, as long as your door has a closer on the inside face. A benefit The Sleeve provides is that the door can be secured by anyone (substitute, building aide, or student to name a few), not just a person with a key to the door. Additionally, because the door is secured from the inside the teacher does not have to risk being in the hallway with an active shooter.
Can The Sleeve be removed quickly if an evacuation is necessary?
Do we need to make any installations or modifications to the door or any other parts of a buildings structure?
Are door closer arms the same?
How durable is The Sleeve?
The Sleeve is solid, 12 gauge carbon steel (.104″ thick) folded to your specifications. The Sleeve is capable of withstanding more than 550 pounds of force.