Features: 6 optional sizes: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, meet your different demands. A must have instrument for teeth correction tooth orthodontic surgery. Made by high quality stainless steel, safe to use. Put in round box, easy and convenient to use. 50g stainless steel wire, durable to use.(due to different sizes, the length is different)