this be a fabulous product . although I have read complaint about the assembly direction , I think they be clear . it be always a good idea to read the instruction all the way through before assemble anything . the 1st page list all the part and show the exact size of the different screw . each step tell you which size screw to use . the only thing I would recommend be that you use a crescent wrench along with the allen wrench that come with the kit for tighten the screw . the screw fit tight and be stiff to turn . with a crescent wrench , it be not a big deal . it do take over a hour to assemble , but it be very sturdy and safe to use when complete .