High security door lockOver half of all burglaries are initiated by forced entry. A majority of these are accomplished by kicking in a door. Door locks help provide extra protection from forced entry. Designed to withstand up to 800 lbs. of force, making it virtually impossible to breach from the exterior.DESIGN FEATURES:In the locked position, the lock is designed to resist up to 800 lbs. of force.Prevents lock bumping or lock picking.Cannot be opened from the outside.Tamper resistant.EASY INSTALLATION:Installs in minutes. Easy to follow instructions included.(800) 255-35051-3/8" 3.5 cm 1" 2.5 cm 3" 7.6 cm 2-7/16" 6.2 cm 2-3/16" 5.6 cmZZ 511primeline.netprimeline.netTo open, pull out and ip open the door lock away from door.U 10826 (Gold anodized)U 10827 (Satin nickel)U 11325 (Brushed chrome)U 11441 (Red bronze)U 11126 (Classic bronze)U 11449 (Matte black)U 11442 (Brass plated)Scan here to see the customer testimonial video.http://tinyurl.com/HighSecurityDoorLockDoor closedLockedUnlockedUnlockedTo unlockTo lock