Good for corsets, lingerie, gowns, millinery, costumes , crafts and more, you need hardware to cut it, need cap tips or covered the covered the end or put in the casing to use spring steel round wire. Safe to dry clean! Made of hardened, galvanized, spring steel round wire. Safe to dry clean! Spiral steel boning offers flex on two axis... this makes it perfect for boning curved areas and areas where comfort and flexibility are most important.