Talking about the bar that runs at a 45 degree angle from the doorknob to the floor, and which is supposed to prevent the door from opening.
Jus how much force will it withstand? I suppose it depends on the floor surface. If the entryway is stone, e.g., it would be more effective than if the bar rests on a thin carpet of some kind.
Any thoughts?
(PS-- Bought one of these bars several years ago after seeing a news item whereby an intruder inserted a special key in the front door keyhole and tapped it with a hammer, releasing the deadbolt. Scary.)