Features: *Faster and More Efficient:These ceiling sleeves can be installed on electric drills to make the nuts faster and more efficiently, eliminating the need for manual twisting. *Accurate Height Adjustment:Equipped with an HD scale, these sleeves provide more accurate height adjustment, eliminating any guesswork. *Easy and Effortless Leveling:With seamless links and high concentricity, these sleeves make leveling a breeze, effortless operations. *Lengthening Design:Available in different lengths and sizes, these sleeves enable the twisting height to be extended, eliminating the need to stand on high places or ladders and making work more convenient and safer. *Corrosion-resistant and Sturdy:Made of high hardness chrome-vanadium steel with plating treatment on the interface, these sleeves are wear-resistant, rust-proof, corrosion-proof and sturdy. Specifications: *Product Name:Ceiling Leveling Sleeve *Material:Chrome-vanadium steel *Styles:10mm(1pc),12mm(1pc),13mm(1pc),14mm(1pc),17mm(1pc),10+12+13+14mm(1pc/size,4pcs/set),10+12+13+14+17mm(1pc/size,5pcs/set)(Optional) *Size:Approx.10mm,12mm,13mm,14mm,17mm(Diameter) *Total length:About 170 mm *Working Depth:About 130 mm *Shank diameter:About 6.35 mm *Color:Silver *Application:For Leveling Ceiling Package Content: 1 * Ceiling Leveling Sleeve Or 4 * Ceiling Leveling Sleeves Or 5 * Ceiling Leveling Sleeves Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.