Claborn Manufacturing, a division of Cornerstone Inc., is pleased to announce the one-of-a-kind Defender Frame Integrated, which can now be built into the Security Hollow Metal Door/Frame during the manufacturing process. When used with new construction, this eliminates the need for retrofitting the lock housing to the outside of the door frame.

We still offer the surface-mounted version for existing facility upgrades and retrofits, but now this premier, ultra-security Defender Frame Integrated can be specified during the design phase of new justice projects, allowing for the door and the enhanced lock frame pocket to be precisely manufactured as a flush-mounted Defender Frame.