DIY Dog Collar Hardware Kit Includes a Metal Side Release Buckle with Tri glide adjuster and D Ring Material: Zinc Colors: Rainbow, Rose Gold, Matte Black, Antique Brass, Silver Sizes: 17mm, 20mm, 25mm *D Ring sizes are 16mm, 20mm and 26mm* Leash Hound is not responsible for any damage or injury caused by using our products. You are responsible for determining whether these items are suitable for each situation. Inspect hardware and supplies for signs of wear and tear regularly, and replace when appropriate.