【Specifications】Package including 2 pcs zinc alloy security door slide lock and 12 pcs screws,for specific size details,please see figure 2 dimensional drawing.Please check the product size carefully before purchasing. 【Quality】This door latch is made of high-quality zinc alloy, which is anti-corrosion and durable material can ensure quality and durability and can be use in wet weather and environment,will has a long service life. 【Easy to install】Door latch left and right sides can be installed, the mechanism is activated by rotation, and the rotation is to close the door. Simple operation and easy installation with 12 screws no need to buy screws again. 【Design】This twist lock comes with screws for installation, works perfectly on both sides of the target door. The door lock can be installed rotated side left or right to activate a mechanism, and it works by rotating the knob which attaches to the door and you can rotate the knob makes the bolt to slide into a the door frame,which can resist illegal intrusion protection and provide double insurance. 【Application】The bolt lock is a kind of security anti-theft door lock.Small internal latch bolt easy to install, installed on the doorwindow, effectively prevent intrusion of strangers, the multi-perforated and anti-theft fixed buckle is more solid, does not fall and can ensure safety throughout the day,that is widely used for front doors,hotel door, bathroom door, windows and other furniture, and can serve as double insurance, provides reliable protection for you.