Specifications:This high security door lock is constructed of aluminum alloy.This reinforcement lock meets the building code requirements, and it is designed towithstand up to 800 lbs. of force, making it virtually impossible to defy from the exterior.This lock features a spring-loaded, child-safe and tamper-resistant design that protectsagainst unauthorized entry by preventing lock bumping and lock picking (while in the locked position).Installation of this non-handed reinforcement lock can be accomplished in just minutes, and it can be used on any swing-in door of any door thickness.Item Name: Door Reinforcement LockMaterial: Aluminium AlloyFeatures: Super Strong, Sturdy, Reinforcement, Security ToolSize: 7cm x 5cm x 1cm/2.76" x 1.97" x 0.39" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package:1 x Door Reinforcement Lock4 x Screws1 x User Manual