Spring Opening design opens with ease and when closed is secure,also work great for key rings MATERIAL: Zinc Alloy with rust-preventive coating. High strength and high resistant to corrosion. QUANTITY: 4 pieces SIZE: Picture two shows all the size, 4 sizes options, 1" , 1 1/4" and 1 1/2" GUARANTEE: 3 month guarantee, For any reason you're not completely satisfied, Please contact us, if you have any problem with installation or product quality, we will be happy to solve your problem. Bag hook