You Will Receive: Total 400 Pieces in a Box, 200 Carabiners and 200 Key Rings, Enough Quantity to Meet Your Daily Needs. Ring Diameter: 2.5cm. Each Carabiner Length: 3.2cm. Premium Material: These Metal Keychain Clips Are Made of High Quality Zinc Alloy With Smooth And Shiny Surface, Lightweight, Sturdy And Durable, Which Will Not Rust Or Break Even For A Long Time. Wide Application: These O-ring Keychains And Lobster Clasps Are Perfect For Crochet Figures, Jewelry Making, Kids Art Projects, DIY Accessories, Making Lanyard Buckles, Pet Buckles, Hanging Toys, Car Keys And Other Small Items. Ideal Gift For Your Family And Friends. Easy To Use: The Lobster Clasp Keychain Has A Powerful Lobster Clasp. Spring That Can Be Easily Opened By Gently Pressing With The Carabiner And Automatically Closes When Your Hand Is Released.