Strong and sturdy: Made of high quality stainless steel, it resists rust and corrosion. The keyless design makes it easy to secure the glass door and prevent it from being opened. Beautiful and elegantinstalled on the under side of the door. Easy to install, no need to punch holes in the glass, just punch a 0.47 inch-0.6 inch round hole in the ground. Safe and convenient the door lock has a twistable handle to easily lock the glass door. The door lock is suitable for 0.39 inch -0.47 inch glass thickness and the gap between the glass door and the ground is 0.2 inch-0.4 inch. Note: This Lock Only fits for the Thickness of a 0.39 inch -0.47 inch Glass Door. Please Check your glass door's thickness. Polishednot easy to damage, long service life, simple and generous design, easy to install and maintain. Scope of application: glass doors for homes, hotels, bathrooms, shops, companies, warehouses, offices, balconies, etc..