APPLY TO - Widely used for cords of lanyard, clothing, backpack, shoelaces, drawstrings, luggage, bag, and a variety of outdoor and gym accessories.SPECIFICATIONProduct Name: Bell End StopperMaterial: PlasticTotal Size: 10 x 11mm/0.39" x 0.43"(D*H)Large Hole Diameter: 6mm/0.24"Small Hole Diameter: 3mm/0.12"QUANTITY INCLUDED - 100pcs Bell End StopperADVANTAGE - Drawstring rope stoppers are made of plastic, sturdy and durable, lightweight and resistant to wear, which can be used for a long time.INSTALL: Just stick it through, tie a single knot, and pull hard. It will give you a firm grip, help prevent drawstrings from slipping.Note: Please according to the thickness and width of your needs to choose the proper cord lock