The 9/16" Hollow 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 Please note that hollow socket can accommodate about 9/16" hexagonal nut, which is most suitable size for our hollow socket.1/4 hexagonal shank designed can connection to most electric drills and is suitable for long threaded rod, bolts This set of hollow socket is selected from steel, which is strong, stable, wear resistant and not easy to break after long use 9/16" (12inch) Hollow Socket，360 Rotatable 1/2inch Impacts Grade Socket Adapter with 1/4" Hexagon Shank, 1/2inch Impacts Grade Socket Adapter with 1/4" Hexagon Shank For professional workers, tightening nut by hand is laborious. Our hollow sleeve can be used with electric drill to quickly tighten long-threaded nut, greatly improving your work efficiency, Manufacturer: HDOYTXXM