Quality Material: Tire Bead Lifter Disc Helper Rim Clamp is crafted from engineering PP, wear resistant, ensuring long term performance and reliability in tire changingDimensions: Diameter of 25cm/9.84inch, hole diameter of 2.5cm/0.98inch; Please check the size before placing an orderFor Tire Changer Machine: This Auxiliary Arm is an essential part for automatic tire changers and is designed for improving the efficiency of installing and removing tiresEasy Installation: The Tire Bead Lifter Disc Helper is easy to install without complicated stepsHigh Performance: The Tire Bead Lifter Disc Helper Rim Clamp has high performance and reliability Size Chart: Diameter 25cm/9.84inch;Hole Diameter 2.5cm/0.98inch Package Includes: 1 Tire Bead Lifter Disc Helper Rim Clamp Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.