Safety Chain Door Lock Heavy Duty Latch with Spring Anti Theft snap Lock, Stainless Steel Brushed Nickel

【Door Chain Lock】This chain lock is a safety locking device for doors that allows you to keep the door slightly open for safe observation and ventilation. Provide additional security for your family. It is helpful for children, pets, and the elderly. 【Spring Button】This chain lock for inside door is designed with a spring button, which can be pressed to release the chain and cannot be unlocked from the outside, providing reliable protection. 【High-Quality Material】This safety lock is made of high-quality stainless steel, which is durable and does not rust. Thickened plates and chains make it stronger and more stable. Material thickness: 1/16 inch. 【Size】Large base plate size: 122 x 22mm / 4.80 "x 0.87" ; small base plate size: 62 x 22mm / 2.44" x 0.87" ; chain length: 170mm / 6.70". 【Packaging Content】2 door chain lock, Comes with screws.