The Door Jammer (MACE Big Jammer) is an expandable bar that installs quickly underneath the doorknob and against the floor, effectively bracing the door from being opened by an unwanted intruder. Our door brace (#M80115) is made from 20-gauge steel and comes with end caps so it won’t scratch your floors or the finish on the door.

 Don’t mess around and take chances when at home or traveling. The door jammer gives you added protection in a hotel or motel room, or when you’re staying at that remote beach house or vacation condo you are renting for a few weeks.

Put A Door Jammer on Sliding Doors

The bar easily adjusts with the push of a button to fit most hinged doors and it even works with those hard to secure sliding glass doors. And when you aren’t traveling, it is versatile enough that you can use it in your own home every night. You don’t have to cut a broom handle down to size to block the glide path of the sliding patio door, this door jammer is adjustable so it fits the first time, plus it’s a much more attractive way to block the door closed.