mount demount duck head tool used for many tire changer machines The insert shape is designed according to the shape of the duck head and the edge of rim, easy to use With smooth surface to reduces friction, make the tire change more faster and efficient It prevents wheels from scratching and damaging when clamping wheels from inside clamps Made of high quality stainless steel material, high strength and durable This is a stainless steel tire changer mount demount duck head tool. With optimal tire change angle and smooth surface, it is a great tool for help you change tires fast and esily. There are 28mm & 30mm for your choice, directly replacement for theold one. mount demount duck head tool used for many tire changer machines. The insert shape is designed according to the shape of the duck head and the edge of rim, easy to use. With smooth surface to reduces friction, make the tire change more fasterand efficient. It prevents wheels from scratching and damaging when clamping wheels from inside clamps. Made of high quality stainless steel material, high strength and durable.