Mechanical Keyless Entry Door Lock - NoBatteries, No Hassle This 2nd generation mechanical keylessentry door lock features dual unlocking methods with both amechanical password and a physical key. It automatically locks whenthe door is closed, providing strong anti-theft andtamper-resistant performance for more convenient and effectivesecurity. The mechanical keyless door lock iscompatible with doors ranging from 1.4 to 2.5 in (35-65 mm) inthickness. It comes with multiple sets of mounting spindles andscrews, allowing you to choose the appropriate installationaccessories based on your door type for better flexibility andconvenience. Designed with adjustable handles, movablebolt strikes, and enlarged mounting plates, this keyless mechanicalcombination door lock allows you to replace your old door hardwarewithout additional cutting or drilling. Simply swap out the oldlock with the new one to maintain your door's appearance. Automatically locks when the door isclosed, enhancing your home's security. The upgraded stay-open modefacilitates frequent entry and exit, making it especially suitablefor children or the elderly. When this feature is enabled, themechanical door lock functions as a regular door handle. Secure your home with a high-qualitymechanical combination door lock. The zinc alloy latch boltavoids forced entry, while the stainless steel strike platewithstands harsh weather, providing water, rain, sun, freeze, andrust resistance.