Originally Posted by Onebyone

That is disappointing. Have you tried putting Elmer's School glue on the screw and then tightening? That may work to hold the screw until needed to put in new blade. I did this with one of my Olfa cutters. That screw kept coming loose after a couple of cuts. It didn't take much effort to unscrew with the glue but it held the screw tight. After I thought I got my money's worth using it I tossed it.