Construction: Made from, these 21cm embroidery hoops excellent wear resistance and long term durability for both home crafting and professional use Compact spring action embroidery hoop enables quick setup and portability, making it essential for organized craft rooms and mobile stitching toolkit Innovative Spring Mechanism: Features unique spring design that allows easy tension for embroidery floss, ensuring fabric remain flat during hand stitching and needlework craft projects Multi Craft Compatibility: Perfect for various embroidery techniques including stitching, sewing, clothing repair, and other needlework handicraft, making it essential tool for all skill levels of embroidery craft enthusiasts Quick Setup Design: Simple installation process lets you secure fabric instantly by placing it between the stitching hoops and adjusting to desired position, saving time for creative sewing and embroidery craft project