This heavy-duty tool easily installs eye lag screws up to 4-1/2 in L as well as self-tapping eye lags screws for metal. Overall length is 2.7 in and will fit any standard size chuck. Use with any drill or driver.Easily drives eye lag screws into wood or metal with any drill or screw gunCompatible with all wood and self-tapping eye lag screwsHardened steel construction designed for heavy use and commercial installationsYou may lose it but you won’t break itFive pieces in interlock boxInterlock boxes connect for endless storage options