High quality material: The perfectly fitting instant button is made of zinc alloy, sturdy and durable, and not easily corroded Card slot design: The unique card slot design makes the adjustment very sturdy and easy to disassemble. No tools required, no sewing required, detachable and reusable. Easy to use: Changing jeans buttons doesn't require any tools, it only takes 3 seconds to easily increase or decrease the size of the clothes Easy to install: You can change the buttons of any clothing every day. Surprisingly, this kit has become the fastest way to replace buttons, increase or reduce space around the waist and other areas of jeans. Widely used: seamless instant buttons for shirts, jeans, suspenders, jackets, bags, leather crafts, and other heavy fabrics