Five stars because WITH an Amazon next-day replacement we were able to get ONE good vise out of TWO.This is a great value IF you take it apart COMPLETELY right away.You can see complete threads in the hole in the first picture.You can see cast iron that was stuck on the hold-down bolt in the second picture.You can see where the residue came from in the third picture. There was not enough thread left to hold the fixed jaw down with any confidence! NOT SAFE for milling!For this price it is unrealistic to expect stringent quality control.But it IS realistic to expect the device to provide safe service.The fixed jaw on the replacement Amazon sent (REALLY quickly!) had complete good threads. Bolts HAD been a little overtightened, but not enough to strip out the cast iron.Quality control gives more reasons to take it apart FIRST:- many of the holes are not deburred, so parts will seat better after a little scraping- many edges are sharp (SOME have been eased) so being able to stone contact edges is appropriate- some of the grease is misplaced (the contact button needs more lubrication to do it's job correctly)- EVERYTHING needs to be FULLY cleaned because there is grinding detritus all over the vise!With the above taken care of this is turning out to be pretty nice. It is MORE accurate than my drill press, but we'd have to spend some time on a surface place with indicators before we'd be comfortable with it on a milling machine.If I DO get some surface plate time I'll report back on how well it meets its specifications.But with simple checks against squares it is already a five star value... AFTER Amazon's excellent replacement actions!