High-quality Materials: The surface is made of carbon fiber, durable, scratch-resistant, breathable, and sweat. The fixed bearings are made of stainless steel, which is abrasion-resistant, stable and reliable, and is not easy to damage. The use cycle is long and supports you smooth and easy to rotate. Function: This product is a metal bearings, smooth rotation, no stuck, 360-degree free rotation. There is no need to operate continuously, one-handed operation, complete in one breath. Whether it is reversing, turning sharply, or parking, it can be solved well and gives you a good driving experience. High-quality Design: Use stainless steel fixed bearing, tightly fit the steering wheel, more secure. The design is very suitable for your arm, and the helper drives the driver's steering wheel, so that you are free of the soreness of your shoulders and backs. Universal Fitting: The product size is 2.3In x 3.1In.Suitable for most cars, trucks,tractors, SUVs, cars, forklifts. Easy to Install: First, select the right position, pad protection pad, align the fixed axis hole, then put the screws into the screw hole, align the Booster's head to the screw, and push it forward. Finally, tighten with a screwdriver.