Quality Material: This ball-shaped rope buckle is made of preferred plastic, which is not easy to break and is sturdy and durable. The design of the spring buckle greatly improves flexibility, allowing your rope to remain firm. r nSize and Packaging: You will receive 50 black spherical spring buckles, which are 18 mm long, 21 mm high, and 14.3 mm wide. The opening of the spring buckle is 4.5 mm. Please confirm the size before purchasing. r nWide Application: These spherical rope buckles have a wide range of uses, suitable for clothes, sports shoes, sports pants, hat clips, pet backpacks, wallets, tote bags, tents, etc. You can also use them to make some small accessories. r nEasy to Use: This rope buckle is suitable for 4.5 mm rope. Before use, you only need to press the top to pass the rope through the spring hole, and then release the top to fix the rope firmly. If you want to adjust the length, just press the top to adjust it. r nUseful Gift: These spherical spring buckles are a very practical everyday item, and I think it would be a very useful gift to give them as gifts to family or friends. r nMaterial: Plastic r nColor: Black r nSize: Length: 18 mm, Width: 14.3 mm, Height: 21 mm r nQuantity: 50 pcs r nEasy to Use: This rope buckle is suitable for 4.5 mm rope. Before use, you only need to press the top to pass the rope through the spring hole, and then release the top to fix the rope firmly. If you want to adjust the length, just press the top to adjust it.