High quality materials: louver maintenance plug made of high quality plastic, without screws, rust free, easy to crack, corrosion resistant, anti-aging, durable and reliable for long-term use. The classic white design of these louver maintenance pins is suitable for most louver panel colors and textures, which brings you a lot of convenience. The pins are small, easy to store and will not occupy too much space. Easy installation: installation mode: two end installation, internal installation and side installation; The maintenance latch is with spring. If the shutter shaft is broken, there is no need to remove the door column. It can be directly replaced with the latch. It only needs to be installed by itself in a few minutes, and the replacement or maintenance items can be easily completed. Package includes: 20 louver maintenance pins; This quantity is enough to meet your use and replacement needs. You can repair the damaged vertical louvers without purchasing new vertical louvers. It costs less money and time. Widely used: these spring maintenance pins can replace damaged or lost spring pins; It is suitable for families, shops, offices, etc. it is widely used in your life. It is suitable for most shutters, so it is very practical for your daily use.