Material of this dog collar: Hand polished 316L stainless steel chain. High strength and hardness, heavy, durable, no rust, no discoloration after years of use We have designed a special snap for your dog, please check the details shown in the picture. The latch is easy to lock and unlock, but it's so strong that even 700 pounds of force can't pull it off Collar Size and Fit: Chains are 19mm (0.75") wide and 15" to 26" long. Please note that this chain is not adjustable, use string or tape to measure the dog's neck where you want the collar to be placed, then add about 1-2 inches. Who needs this collar: Do you have a chewy dog? If yes, this collar is perfect Luxurious Cuban links look cool on both boys and girls dogs. Three sizes: 19MM wide, 45CM; 19MM wide, 50CM; 19MM wide, 55CM; What I like about this chain: The walking chain is solid and heavy because it is not hollow. The high polishing process makes the finish shiny, smooth and comfortable, so we are sure that your dog will be delighted to have this collar. Welded stainless steel D-rings for attaching tags and dog leash, very strong, don't worry about breaking.