This is a stainless steel tire changer mount demount duck head tool with diameter 30mm. With optimal tire change angle and smooth surface, it is a great tool for help you change tires fast and easily.Features: new 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 stainless steel material, high strength and durable. Specifications:Condition: 100% brand newMaterial: stainless steelColor: silver + yellowInstalling Hole Diameter: 30mm / 1.2inOverall Size: 17.7 * 8.5cm / 6.9 * 3.3inPackage Weight: 751gPackage List:1 * Tire Changer Mount/Demount ToolNotes:1. Please kindly check the dimension and pictures to make sure perfectly fit your machine.2. It is easy to install, but professional installation is always recommended.