This tool helps install the washer and nut onto hard to reach through bolts , stop taping and superglueing nuts and washers together and dropping them in the worst spots.  Make your life easier, this holds the nut centered below the washer so you can get the nut started without droping the washer.  No more struggling at the edge of your reach!
 
3/8 square drive to attach to a rachet or breaker bar for longer reach
Can also be uses by hand with no ratchet.