ALLMETAL Kwik Klip Adjustable Collars Adjusts 18 inches to 26 inches. This nylon dog collar has Die-Cast Zinc Buckles and Stainless Steel Springs and is rust resistant and has a tensile strength of 500 lbs. The buckle is much stronger than plastic with a beautiful nickel finish. This collar is available In five colors Red, Blue, Black, Green, and Purple. This adjustable dog collar can not have a rivet on name plate attached.