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 swivel prevents the leash from getting stuck, as it rotates with every movement. The ClicLock clasp replaces the center plate on this model, ensuring quick and easy fastening of the collar. The integrated jacket prevents accidental opening of the clasp. This eliminates the need to pull the collar over the dog's head and makes it ideal even for dogs with larger head sizes. The links hooked into the ClicLock are positioned away from the dog's larynx, preventing any pressure on this sensitive area. Please note that the training collar is recommended for use only when the dog is leashed 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 with slip chain, swivel, and ClicLock for effective and safe dog training. For the black stainless steel finish, the surface of the material is blackened through an electroplating process and then polished. Since this is not a permanent coating, an attractive antique finish will develop over time due to friction. Therefore, we recommend using a collar made of CUROGAN for dogs with very light or white fur to reduce the risk of discoloration.