Features: One 9/16" (12inch) Hollowed Socket，One 360 Rotatable 1/2inch Impacts Grade Socket Adapter with 1/4" Hexagonal Shank, 1/2inch Impacts Grade Socket Adapter with 1/4" Hexagonal Shank. The 9/16" Hollowed nut driver with a 360 rotating socket adapter, which not only help you perform ceiling fastening work, but also allows you to install nut in hard-to-reach place. The 360 rotating function also reduces the burden on your arms. For professional workers, tightening nut by hand is laborious. Our Hollowed sleeve can be used with electric drill to quickly tighten long-threaded nut, greatly improving your work efficiency. This set of Hollowed socket is selected from steel, which is strong, stable, wear-resistant and not easy to break after long use. Please note that Hollowed socket can accommodate about 9/16" hexagonal nut, which is most suitable size for our Hollowed socket. The 1/4 hexagonal Shank design can connection to most electric drills and is suitable for long threaded rod, bolts. Specifications: Component:Carbon Steel Size:Approx.300mm/11.81inch Package Includes: 1 Set Hollowed 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.