My new door has a mechanism where you first have to pull the handle up to engage this hook-like bolt and then lock the door with key or knob. I thought it was a

My new door has a mechanism where you first have to pull the handle up to engage this hook-like bolt and then lock the door with key or knob. I thought it was a bit tedious but now I finally understand the purpose. The bolt would prevent the door from being pulled apart from the frame easily.