Faster and More Efficient: These ceiling sleeves can be installed on electric drills to tighten nuts quickly and efficiently, eliminating the need for manual twisting. Accurate Height Adjustment: Equipped with an HD scale, these sleeves allow for precise height adjustment, removing guesswork. Easy and Effortless Leveling: Featuring seamless links and high concentricity, these sleeves enable smooth and effortless leveling operations. Lengthening Design: Available in multiple lengths and sizes, these sleeves extend the twisting height, reducing the need to work from elevated positions and enhancing convenience. Durable and Sturdy: Made from high-hardness chrome-vanadium steel with plated interface, these sleeves are wear-resistant, rust-proof, and built for durability. Product Name: Ceiling Leveling Sleeve Total Length: Approximately 170 mm Working Depth: Approximately 130 mm Shank Diameter: Approximately 6.35 mm Application: For Leveling Ceilings Color: Silver Material: Chrome Vanadium Steel Sizes: 10mm, 12mm, 13mm, 14mm, 17mm (Diameter) Package Contents: 5 x Ceiling Leveling Sleeves Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by 1-3 cm due to manual checking.