Mace Big Jammer Door Brace This door brace is an adjustable door brace made of strong 20 gauge steel and is ideal for home, dorm, apartment or office use. Installs easily under door knob and provides added security for home or business. Adjusts to fit most hinged doors. End caps can be removed to allow for use on sliding glass doors. Meant to provide additional security for home or business use.

Please note that no door braces are designed to be the primary locking device on your exterior door. It is intended as additional security used in conjunction with your current door hardware.

Shipping is FREE (Continental USA orders only) if you order a minimum of $75.00 from our web site. Otherwise we will add $8.50 shipping.