Entry Door Stop, 2-3/16-inch, Aluminum, Brass Finish This High Security Door Lock is a spring-loaded reinforcement lock that protects against unauthorized entry by preventing lock bumping and lock picking while in the locked position. This lock is designed to withstand 800 lbs. of force, and cannot be opened from the outside. Installs in just minutes using 3-inch hardened screws anchored to the door jamb, fits any size door, tamper resistant and child-safe design. Meets Texas building code requirements. Note: To open the spring-loaded stop from the locked position, (1) first grip the stop at top and bottom, (2) pull it away (at a 90° angle) from the fixed bracket, then (3) swing it open and out of the way.