Installation:These Anti-theft Hooks are singlely designed to be easily installed on your Slatwall & pegboard. Please fix the key on the top of hook and pull it down while a crackling sound That is unlock status you could hang items or products on the rod body So you assemble them quickly well. Nice for assortment:These Retail Hangers hold different type of retail items and Products in perfectly condition Durability:The Display Hooks would be incredibly durable as they are made from steel with white plastic and a key.So that they make your items Security. They are definitely nice locks for you They are plated chrome by special manufacturer and meet environmetal demand Safety:These Hooks have no Shape so they are safe to touch. Perfectly display:These Hooks could beautify your home ,goods shelves,garage because they greatly show various items in order. On other hand they save your 70% spaces They are nice display fixture ,We have 6" 7" 8" 10"types We Pack 12Pcs each type and if you buy one pack one key for free, So the price is best.