[High Quality Material]: This button is made of high quality copper, which has good rust resistance. [Size Information]: The diameter of each snap in metal is about 9.5mm, and the size of the hand crimping device is 148mm in length, 67mm in width and 20mm in height. [Packing list] 100 pcs buttons snaps include 25 sewing snap kits. A set of buttons consists of 4 parts, which are 2 hollow circles with claws, male and female. [Easy to use]: The clip is easy to use, suitable for the installation of 9.5mm hollow/solid staples. They are lightweight and can withstand pressure. When you use it for the first time, we recommend that you practice on unnecessary clothes. [Wide Use]: Suitable for hand-sewn crafts and repairs, such as shirts, knitwear, baby pants, baby diapers, bibs and other fine garments, jeans, jackets, bags and other items and crafts. Product Description Product Features: Material: ABS Size: five-claw button: size 9.5mm, hand crimper: length 148mm, width 67mm , height 20mm Package: 25 sets of buttons (one set of buttons consists of 4 parts, each is 2 hollow circles with claws, one male button and one female button) [Please note]: This product contains small parts. For safety reasons, please keep this product away from children and avoid accidental ingestion.