National Security & Door has been offering security innovation & design since 1981. NSD sells, installs, and services a vast array of products used in the security integration field and the distribution of architectural door and hardware products used in new and renovation construction projects. We offer security integrators that feature electronic access control and video surveillance, architectural door and hardware sales for hollow metal and aluminum entrance systems, locksmith services, automatic door and low energy handicap operators sales and service, We have also developed and patented a chain resistant, fully serviceable flush door pull that we install in aluminum and hollow metal doors. We have also developed a safe space / classroom lockdown mortise lock with a visual lockdown indicator using market available locking hardware and NSD developed unique enhancement features to achieve the desired lockdown function. With the addition of another NSD developed lock conversion modification; this safe space lock can be made to function with an electronic access controlled lockdown system featuring the mechanical redundancy for the lockdown condition. National Security & Door has an expertly trained technical staff and a full line of products and solutions to suit any project.