Steel bone is SUPER long-lasting chew that is highly digestible and rawhide free. It has a patented special Processing technology combining meat, rice flour and starch to make hard chewing bone through extrusion. The #1 ingredient is Peanut Butter, Beef, or Chicken depending on the variety. Steel Bone comes in 4 sizes KL, Large, Regular and Mini to find all size dogs. A bone dogs can’t resist!