Features 1、The overall appearance is small and beautiful. It not only ensures the safety of products, but also provides customers with a good shopping experience. 2、No need to use any external tools, you can complete the installation by hand. 3、Simple structure and reliable workmanship, can be used repeatedly. 4、Using special magnetic unlocking device to unlock, ordinary key can't open. 5、Can be used for commodity link, supermarket hooks. Specification Features: The overall appearance is small and beautiful. It not only ensures the safety of products, but also provides customers with a good shopping experience. No need to use any external tools, you can complete the installation by hand. Simple structure and reliable workmanship, can be used repeatedly. Using special magnetic unlocking device to unlock, ordinary key can't open. Can be used for commodity link, supermarket hooks. Specification: Condition: Brand New Material: ABS Color: Red + Black Hole diameter: 4.5MM, 6MM, 7MM(Optional) Length: Approx. 4 cm/ 1.6 in Diameter: Approx. 1.3 cm/ 0.5 in Applicable: supermarkets, retail stores, etc. Package List: 100 * Anti-theft Hook Lock