[Premium Material]:These floss bobbins are made from PP,offering durability and resistance to breakage for a long lifespan [Design]:Each card features two thread clamping slots to secure the ends of your threads,with the option to label them for easy reference [Organizational Tool]:Suitable for keeping your threads organized and untangled,these winding boards offer a simple and convenient way to categorize your sewing materials [Versatile Use]:Not just for threads,these winding boards can also be used to organize ribbons,fishing lines,cords,jewelry making wires,laces,and more [Bulk Pack]:With 200 pieces per pack measuring 3.8*3.5cm each,this set makes an great gift for friends and family who like sewing and organizing