High quality materials: The double ball latch is made of zinc alloy, which is durable, waterproof and rustproof. It can be used for many times and is stronger and more durable than ordinary door locks. The surface is smooth and does not scratch the skin. Adjustable tension: You only need to screw the screws on both sides of the lock, you can use a screwdriver to adjust the spring force and fix the door easily and firmly in a simple and effective way, which can give you more sense of security. Unique double ball design: The unique double ball design provides a simple and effective way to absorb the door easily and firmly. It can also be easily adjusted by a spring to fit the exact amount of hold you need in various situations. Easy to install: Our double ball catch with double ball retainer ring with screws is easy to install and can be locked from the top or the side of the clip. The ball tension latch ensures that the door closes firmly, which is not used or does not require a latch. Wide Application: You can use this double ball door lock in restrooms, bedrooms, offices, shops and other places. It is very suitable for drawers, swing doors, bookcases, double doors and some furniture. This is your ideal accessory. Quantity delivered: 6 pieces Product color: silver Product size Large: total length 50mm, hole spacing 39mm, hole diameter 4mm Small: total length: 30 mm, hole spacing: 20mm (as shown in the picture).