1. Material: Tactical dog collar is made of 100% 1000D+ nylon, super stainless steel heavy metal buckle, surface through a layer of electroplating process. 2. All sizes of collars are adjustable. Dog collar width: 1.5 inches. Measure your dog's neck before choosing the right size. 3. Design: Heavy metal fastener can be released and locked quickly. The Velcro area provides a tag or name for your dog. The D ring can be connected to the dog leather belt. You can easily control your dog with a sturdy handle at any time. Safe and practical, allowing your dog to easily feel commands through the power of the handle. 4. Suitable dog breeds: Suitable for most large dogs, such as: German Shepherd, border Collie, Rottweiler, Great Dane, Doberman, golden retriever, Husky, Labrador, Alaskan Malamute, Staffordshire Terrier, bulldog, Chesapeake hound, Dalmatian, etc.