2 installation modes that you can lock from the top of the latch or from the side, you can use them on different heights of furniture. 2 metal balls inside the roller, lock and open smoothly. You have added flexible screws on both sides that fix the locking piece by tightening or loosening as you like. High quality metal ball catch. Good grips for long-time use. Easy installation and ideal for different cupboards, drawers, wardrobes, cabinets, etc.