Tinksky 25pcs Round DIY Spring Fastener Cord Lock Toggle Stopper Buttons (Random Color) Color: Random color. Material: Plastic metal. Size: 11 * 17mm; Hole diameter: 6mm. Can be used for collars, belts, harnesses, tactical backpacks, tactical paracord. Great for camping hiking, emergency survival wild accessories etc. Small buckle with high strength and durability.