Function and compatibility: These composite wedges shims levelers are designed to stabilize and level a wide variety of furniture, including bookcases, sofas, tables, and more. Material and durability: Made of sturdy plastic, these furniture shims are reusable, withstand pressure, and are built to last. They can bear a significant amount of weight. Design and stability: The inclined trapezoid design with an antislip texture provides firm balancing and fixing of the furniture, enhancing stability and preventing slipping or sliding. Stackable: These plastic shims can be stacked together to achieve a balanced and straight furniture placement. Use scenarios: Level a sofa on uneven hardwood or carpet to prevent rocking and improve seating comfort. Stabilize a bookshelf on an uneven floor or irregular surface to maintain plumb alignment. Level a coffee table or dining table on soft carpeting or a sloped surface for a steady, wobble setup.