Package includes 4 pieces of swivel snap hooks sized in 0.77"x3.38" Applications for the swivel hook trigger snap include pet leashes and collar, pet harness, flag hooks, purse straps, backpack straps, keychain, outdoor gear etc. Heavy duty with smooth chrome plated surface. Round shape base. Spring-loaded triggers. 360-degree rotation for easy clip, swivel flexible to prevent tangles. Durable and anti-rust design for long-lasting use. Garwor 4Pcs Heavy Duty Chrome Swivel Snap Hooks with Spring,Flag Hooks 0.77"x3.38",Pet Buckle Multipurpose Dog Leashes Key Chain for Linking Pet Leash & Collar,DIY Crafts