Ball Stretcher & Crusher With AttachmentThese Ball Stretchers come with a fantastic ball crusher that is an ideal attachment for CBT (Cock & Ball Torture). Material – Crusher: Stainless Steel Material – Stretcher: Surgical Steel Diameter; 35mm 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.