The SPRENGER training collar combines outstanding quality with innovative design for effective dog training. Made of high-quality, rust-free stainless steel, it is the epitome of durability and safety. The slip-chain model offers limited pulling force, while the center plate, as with all original SPRENGER training collars, relieves pressure on the dog's sensitive larynx. All links are rounded for maximum comfort and eliminate the risk of injury. If needed, the center plate can be replaced with our ClicLock clasp – this eliminates the need to open the chain at the links and allows for quick and easy application. For the black stainless steel finish, the surface of the material is blackened through an electroplating process and then polished. As this is not a permanent coating, an attractive antique patina will develop over time due to friction. We therefore recommend using a CUROGAN collar for dogs with very light or white coats to reduce the risk of fur discoloration. Please note that the training collar should only be used while the dog is on a leash and during training sessions. It is not suitable for off-leash walking, transport, or similar uses. Trust in the proven quality of SPRENGER and choose the training collar for effective and safe dog training.