Description: 【Sturdy High Carbon Steel Construction】: Crafted from high carbon steel, this impact nut driver socket accessory set  is heat treated for enhanced durability, ensuring it withstands heavy duty construction tasks over time 【Efficient Ceiling Installation】: Specifically designed for leveling integrated ceilings, this hollow hex socket accessory set provides precision and ease during installation 【Versatile Compatibility】: The ceiling leveling sleeve set includes a hex shank adapter that enhances compatibility for electric drills, offering flexibility and convenience in different working environments 【High Performance】: The ceiling leveling special sleeve integrated with hexagonal features great working performance, sturdy and long term use, making it versatile for various ceiling installation needs 【Complete Package】: Each package includes a ceiling adjustment leveling sleeve and a hexagonal shank adapter, ensuring you have everything needed for your ceiling projects Specification: Material: High Carbon Steel Size Chart:20 cmx1.85 cm/7.87 inchx0.73 inch 5 cm/1.97 inches Package Includes: 1 Drive Socket Accessory Set Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.