[THICKEN SOLID METAL ROLLER]Made with high-quality metal wheels, riveted steel roller brackets and built-in steel bearings for easy and quiet rolling applications. The thickened and sturdy design makes it easier to achieve a perfect fit on all contact surfaces during use, as well as complete tire and tube patch adhesion during maintenance. Metal spinners work much more efficiently than plastic, wooden and polyurethane rollers. [2 Rollers Meet Different Needs]This car roller is specially used for types of soundproofing mats. Perfect for installing automotive insulation on your entire vehicle. Wide rollers are Perfect for large flat areas, while narrow rollers are Perfect for tight areas and corners. When installing car insulation, it is enough to get these 2 rollers. [Raised Corrugated Design]The roller adopts raised corrugated design to provide optimal adhesion. It has a corrugated profile that helps with better handling and prevents slippage. The rollers move easily over the and the