Are You Too Trusting?

If so, then this is the door chain lock for you. The Lebedev Defendius Door Chain is made from 100% Titanium Alloy Construction, has been tested to handle 700 lbs. of force and guarantees you a minimum of 10 extra seconds to decide if that's really the pizza delivery guy on the other side of the door or a blood thirsty terrorist. Designed for a post-9/11 world where no one can be trusted, not even ourselves.