Since it is a self-locking type, you can install it simply by inserting it into a strong one, so you can use the standard polishing rod (tolerance h9). Outer diameter: 1.0 inches (26 mm). Grip length: 3.1 inches (80 mm). Shaft diameter: 0.5 inches (12 mm). Shaft hole depth: 2.0 inches (50 mm). Heat resistant temperature: 176 °F (80 °C). Polypropylene (80 cm).