Features: Double Size Compatibility : Offers 6mm and 8mm socket sizes to fit common ceiling threaded rods, allowing a single tool to cover most home ceiling installation needs. Secure Grip Not Slipping : Internal special structure firmly locks onto the threaded rod, wobbling or falling off during work for stable installation and removal. Hexagonal Shank Interface : Compatible with power drills and wrenches via a Hexagonal shank design, enabling quick and effortless tool attachment to ceiling work efficiency. High Hardness : Constructed from quality steel for enhanced overall strength, ensuring repeated use without easy wear, deformation, and a long service life. Reach : Features a 17mm hole for engagement, easily handling high ceiling threaded rods without requiring additional extension rod. Specifications: Component:Metal Type:6mm/8mm Size:Approx.66mm/2.59inch Package Includes: 2 Optional Package: Package 1 Include:1Pc Screwdriver Socket Package 2 Include:2Pcs Screwdriver Socket note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.