1.Smooth and durable:The olecranon hooks are made of zinc alloy, the smooth surface and no sharp round edges design is friendly for carrying, they are durable for many times and long-term using, the black coating can definitely prevent rust. 2. Easy to carry:These are very much lightweight enlarged mouth clips,easy to carry and use, you can take these small clips with you all the time during your daily commuting, traveling, walking, hiking and many more. Material:Zinc alloy colour:black Package Contents: 36 * gargoyle buckle Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.