【Installation Instructions】: Suitable for drilling holes with a diameter of 21mm and suitable for most cabinet/drawer doors with a thickness of 15-18mm. 【High Quality Workmanship】: The knob lock is made of solid zinc alloy, durable, clean, burr-free, rust-proof and corrosion-resistant, can be used for a long time. 【Easy to Install】: Equipped with spare screws and lock covers and hasp makes installation easier, all you need to do is screw the hole and tighten it. 【Easy to Use】: The lock is easy to open and close, no key required. Simply press the button to close or open the lock. 【Wide Application】: Fits well for front door, wooden box, desk, drawer, cabinet, cupboard, used as door lock, shed lock, cabinet lock, etc.