Features: Package content: this set contains 6 butterfly spring Door Closers, enough for daily use and replacement. Make of steel for long durability. Both ends of Door Closers is coated with flexible rubber, which is less prone to noise and frictions. Allows you to automatically close the door and solve the problem of family member forgetting to close the door and pet can enter and exit unhindered. Easy to install: without drilling. Simply close the door, pull the hinges pin to up, slide Door Closers spring slightly to it and then fold it open to create tension in the spring. Great for wardrobe door, kitchen cabinet door, bedroom cabinet door, bathroom door, storage door. Specifications: Materials: Steel Thread diameter: about 25mm/0.98inch, length: about 22mm/0.87inch Total length: about 85mm/3.35inch Maximums width: about 38mm/1.5inch Excluding thread length: about 55mm/2.17inch Package Includes: 6Pcs Butterfly Spring Door Closers note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to difference between different monitors, the picture may not reflect the actual color.