Threading elastic into casing has never been easier with this Dritz 3pc Elastic Threaders! These threaders make it easy to thread elastic into casings for waistbands, gathered sleeves, and more. In three sizes—suitable for ¼, ½, and ¾ inch elastics—simply insert your elastic into the slots as shown on the back of the package, then slide the threader pulling the elastic through your prepared casing or tube. The flat design and rounded corners prevent twisting and snagging as you work.