1. Exquisite Material Selection: Made of strength aluminum alloy, thick and wearresistant, featuring surface drawing process, density steel balls for flexibility and smoothness, ensuring stable operation. Equipped with 4 screw mounting holes and white foot pads for strong loadbearing capacity. Lifespan exceeds 5 years. Rotating lazy Susan turntable bearing, furniture ballbearing swivel plate. 2. Installation Instructions: The inner and outer rings have different heights, and the single ring is relatively thick. When using the inner ring, the rubber foot pads can be removed, and the screw can be directly fixed to the workbench, ensuring stable operation and allowing for sizing. 3. Product Features: Durable, waterproof, thick and wearresistant, rustproof, impactresistant, dropresistant, sturdy. Nonslip bolt rubber pads reduce tabletop cushioning, ensuring stability and preventing slippage. Suitable for turntable surface diameters: 250 mm–2000 mm, with adjustable sizing. 4. Additional Note: When selecting bearings, the shaft size should be half the diameter of the rotating surface for performance. If too large or too small, functionality may be compromised. Depending on size, 4 to 8 nonslip soft rubber pads are included. Only 4 screw mounting holes are provided.