I've read the reviews and find it funny how people give such low ratings. They are NOT intended for impact use, ie hand tools only. Using a large 1/2" ratchet and a flat head, I've installed 6 bolts since I ordered them and everything works great. The hub is not damaged, the nut or the bolt is not damaged. The assembler will not damage the tool and neither will the nut be damaged. A little grease in the bearing and it slides like butter once installed. This is simply the absolute best result!