Highlight description: [High Quality Material]The booster uses ABS and iron material, durable and practical. Free spinning knob makes steering effortle. [Size]The size of this steering wheel knob is 5.5 cm/2.2 inch. Keyhole diameter is 2.8cm/1.1 inch. Used to easily turn tractors and other mechanical vehicles. [Easy to Install] The steering wheel power handle includes mounting screws and hex wrench. Easy installation by one person, simple and easy to use and not easy to fall off. [Replacement Parts]This steering wheel knob can be as a car replacement parts, it is easy to disaemble, easy to handle, disaemble and clean. [Wide Application]The steering wheel knob is suitable for steering wheels of most cars, such as ars, trucks, forklifts, lawn mowers, tractors, boats, etc. Detailed description: Product Name: Steering Wheel Knob Specification: Material: ABS+Iron Colour: Black Size: Knob size: about 5.5cm/2.2in Keyhole Diameter: 2.8cm/1.1in Screw size from head to tail: 35mm-40mm-45mm Parts List:1/2 x Steering Wheel Knob 6/12 x Screws 1/2 x Hexagonal Wrench Applicable models: Universal steering wheel for tractors, mechanical vehicles, etc. Note: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.