1.KEEP YOUR HOME SAFE – Designed to withstand 800 lbs. of force, this U 11325 brushed chrome finish door reinforcement lock helps to prevent doors from being kicked in, increasing your home security and keeping you and your family ! 2.EASY INSTALLATION – The included 3" hardened screws make installation a breeze – extra security and peace of mind can be achieved in just minutes. Watch the video on this page for installation tips and operating instructions. 3.ADDITIONAL HOME SECURITY – Use this high security door reinforcement lock for additional home security on any swing-in door of any thickness. It helps to ensure any door cannot be opened from the outside. 4.little boy and little gril-SAFE AND TAMPER-RESISTANT – The spring-loaded design can be installed at a higher level, to ensure it is little boy and little gril-. Plus, while locked, this tamper-resistant door latch protects against the door being kicked in, lock picking and bumping. 5.PRE-DRILLING – The included 3 inch security screws require holes to be pre-drilled with 1/8 inch drill bit. Do not use a drill driver with max torque setting to install the 3 inch screws as you can strip or break the heads. Some doors may require mortising. Additional mortising may be required to fit your door.