Guard Dog Security DoorKeeper Adjustable Door Security Bar Black One Size. The 20 gauge steel construction of these Guard Dog Security Doors & Windows make them a force to reckon with ensuring that they won't force their way in unless you want them to. This Guard Dog Door Keeper Device will work on both hinged and sliding doors securing them effectively against even the largest of intruders. Keep these security products in mind when having guests over as they're a great way to deter thieves and/or children from opening your doors. With removable yolk pins you can easily install these devices on sliding doors as well. Securing your home doesn't have to be a hassle when you have the Guard Dog Security DoorKeeper. Specifications for Guard Dog Security DoorKeeper Adjustable Door Security Bar: Manufacturer: Guard Dog Security Fabric/Material: Steel Package Contents: Guard Dog Security DoorKeeper Adjustable Door Security Bar Guard Dog Security DS-GDDK-BK: DoorKeeper Adjustable Door Security Bar Black One Size