APPLY TO - A spring cord lock can be widely used for lanyards, luggage, clothing, backpack, shoelace, tents, and moreSPECIFICATION:Color: BlackSize: 24 x 20 x 8mm / 0.9" x 0.8" x 0.3"(L*W*T)Hole Diameter: 4mm / 0.15"Material: Plastic, MetalNet Weight: 62gQUANTITY INCLUDED - 40pcs x cord lockADVANTAGE - Made of plastic, durable and lightweight, not easy to break and sturdy you can use them for a long timeINSTALL: Once the cord is easily threaded through the holes, a simple squeeze permanently the alignment mechanism and engages the metal spring to grip any cord.Note: Please according to the length and width of your needs choose the proper spring cord lock.