EASY TO USE - The shoelace lock can lock the shoelaces tightly, don't worry about loosening the shoelaces, clip the shoelaces like a belt, and press and hold the middle button to remove the shoelaces easily.LOCK DESIGN - The button is designed with a spring lock,nonmagnetic and the shoelace can be detached with a single click, avoiding the tedious work of tying shoelaces.Suitable for shoelaces 6mm to 8mm wide.PREMIUM MATERIAL - Made of high-quality metal material, sturdy and long service lifePACKAGE INCLUDED - 12 Pieces of metal lace buckles, 2 pair black, 2 pair silver, 2 pair rainbow colors, enough quantity for your daily replacement needs.PERFECT GIFT - This is a great gift, and they are suitable for seniors with arthritis or other disabilities, children with autism, runners or sports enthusiasts