Clover Temporary Clips for Knitting & Sewing (Pack of 30) are designed for materials that shouldn’t be pierced with pins—such as laminated fabrics, faux leather, genuine leather, or multiple thick layers—securely holding pieces together without leaving pinholes. The outer packaging is a resealable storage bag for convenient, reusable storage. The clips are made from polycarbonate and stainless steel, offering durability and reliability. They perform exceptionally well for securing zippers, binding tape, heavy layered fabrics, or when working on a serger/overlocker. Perfect for both home crafters and professional studios.