Description A single button expands the waistline and easily adjusts the waistband Spring design, good flexibility, flexible stretching How to use: Prepare the buttons and pants, slip the spring into the original button, and thread the button through the buttonhole Specification Style: Metal spring model Uses: Jeans, slacks, etc. to expand the waist, can be expanded by 2-3cm Size: 17mm*27mm Material: Alloy Quantity: 1 Packages include: 1* Spring expandable waist buttons