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McMar Design has created a crisis lockdown safety device that may be the most logical and affordable answer to your safety concerns. Our patented JAMBLOCK™ is a single piece of lightweight crafted steel that will secure virtually any door in seconds.

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The JAMBLOCK… cannot prevent a shooter’s desire to kill.

The JAMBLOCK… cannot prevent a shooter’s attempt to kill.

The JAMBLOCK…can deter a shooter’s ability to kill.