Wonder Cips 50 pc. red - What can they do? Sewing - Wonder Clips are a natural for holding together layered sections of fabric during the sewing process. Quilt bindings, hems, piping, seams, etc., all can be held securely in place while sewing. Unlike pins, Wonder Clips do not leave holes in leather, delicate or vinyl/laminate type fabrics. You can easily position appliqué or hold patterns in place while marking or cutting and avoid puckering issues caused by using pins on some fabrics.