Description If you are looking for a professional and affordable door reinforcement lock, then your research is over here. That's because our product can meet your need. Adopted of premium material, it is practical and durable for long time use. It is not easy to get deformed and bring you much convenience. Features -Color:Silver-Material:Aluminum alloy-Size: 8.50X7.60X2.50cm;/3.34X2.99X0.98in;-How to operate: Put your index finger on the top of the door lock and your thumb on the bottom, slide the lock away from the bottom plate along the hinge direction of the door, and then pull it out.- Designed to withstand 800 lbs of force, heavy duty construction, very strong and safe.- 12 times stronger than ordinary deadbolts, it not only prevents break-ins, but can also be easily opened in case of emergency.- The spring-loaded design makes this door lock a child safety lock. It can be installed on doors out of reach of children, effectively preventing children from sneaking out of the front door.- Install the door reinforcement lock on the door frame using an electric screwdriver and drill, and complete the door lock installation in 5 minutes.- Easy to lock and unlock, no key required. No tools required to open, just needs a little practice.Packing list: 1 x safety lock4 x large screws4 x small screws