I used this tool to lock the crankshaft on a 2005 xterra with the 4.0 liter engine so I could remove the harmonic balencer bolt etc.. Works on other 2005 and newer Nissan 4.0's. do your homework on that though to be sure. I bought it new from Ferrum tools. I'm done with the project so I don't need it anymore. It worked great.  This came with the warning ( pictured) about not using power tools with this. So on the crank bolt I used a  hand wrench with a cheater bar instead of a power tool. It is a version of the nissan tool no. J-48761. it is a Stallion tool no. st-310. So save a little and buy it from me!! Thanks!