Set Total Includes: 2Pcs sound deadening rubber roller with different size for you. High Quality: The surface of the noise pressure roller is made of silica gel. The high-quality material with good toughness will not damage the sound insulation material. It is wear-resistant, smooth and high temperature resistant. Comfortable Use: Solid wood handle, wear-resistant, ergonomic design, reduce hand fatigue, feel comfortable. Two Way Bearing: Ensure the stable and flexible operation, effectively improve the welding speed and construction quality. Suitable for: Aids in quick application of car audio sound deadening matts or headliners in car interior to help with road noise. An inexpensive handy tool to include in your roof patch kit to ease installation of sound matting.