This heavy duty dog collars has metal double pin buckle with 5 adjustable points, convenient for you to adjust the length as desired. This is made of high quality and durable nylon material with neat stitching and soft padded lining to prevent chafing for your dog's skin and hair with a comfortable fit. Also has a stainless steel D-Ring can be attached a dog leash to keep your dog next to you easier by your control. The velcro panel on this collar can be placed for patches.