Medical Steel Clamp Forceps These surgical steel tongue & nipple forceps are a must have in any BDSM toy box. Approximate Measurements: Length: 170mm Max Opening: 143mm Tips: 30mm This product is certified 100% Non-Magnate and medical-grade steel. Beware of cheaper products that are not solid surgical steel but chromed steel or poor quality surgical steel that contains Magnate. Magnate is the ingredient that makes steel rust. We will only include this endorsement on our 100% surgical steel products.