Function: It is a new duck head shaped mounting and dismounting tool used for many tire changer machines. It can be used for many times with stable and high performance characteristics. Fine Design: With smooth surface to reduce friction, make tire changing faster and more efficient. At the same time, it prevents the wheels from scratching and damaging the wheels when clamping the wheels inside the clamps. Usage: The shape of the wheel clamps makes it easy to use. Insert is designed according to the shape of the duck head and the edge of the rim, easy to use. It is durable enough to handle the stress of larger tires and wheels. Diameter: Installation hole diameter is 30mm; Total size: 17.7 * 8.5cm / 6.9 * 3.3in. Material: This disassembly head is made of high quality stainless steel material, high strength and durable. Product description Description: It is #39;This is a stainless steel tire mounting and demounting tool with a diameter of 30 mm. With optimal tire changing angle and smooth surface, it is a great tool to help you change tires quickly and easily. And avoid scratching the damaging grinding wheels when tightening the inner flange wheels Specifications: < p>Condition: 100% Brand New Material: Stainless Steel Color: Silver + Yellow < p> Installation Hole Diameter: 30mm / 1.2in Overall Size: 17.7 * 8.5cm / 6.9 * 3.3in Package weight: 751g Package contents: 1 * Tire changer assembly / disassembly tool Notes: < p>1. Please kindly check the dimension and pictures to ensure perfectly fit your machine. 2. It is easy to install, but professional installation is always recommended.