Fangrui Product Details High Quality The Ergonomic Design Wooden Handle Is Comfortable To Hold, Sturdy And . And The Wheel With Quality Bearings Rolls Extremely Smoothly In A Good Heft, Heavy Enough To Flatten With Ease. Sound Dampening Roller Is Riveted To Bracket On Both Ends Which Helps Keep It Going Straight When Applying Moderate Pressure. Sound Deadening Roller Application The Sound Deadening Roller Allows The Sound Insulation Pad To Be Mounted More Effectively On The Of The Car, And It Also Allows The Tire And Tube Patch To Adhere Completely During Maintenance. And Its Suitable For Soundproofing Mats, Audio Sound Insulation And Damping. Efficient Work The Car Sound Deadening Roller Tool Most Suitable For Auto Deadening Mats And Heat Abatement Mats Application,also Could Be Used For Wallpaper Application Multiple Size Options Package Including 4 Sizes Of Rollers: One 6mm/0.24inch (width) Metal Roll, One 20mm/0.79inch (width) Metal Roll, One 40mm/1.57inch (width) Metal Roll And One 50mm/1.97inch (width)rubber Roll,one Doub