Mine arrived ready to work with just a tiny amount of clean up. Vise was smooth operating, and very clean appearance. The bottom of the one I got is very flat, like wringing flat. Keyways are 14mm. Jaws open to 4-7/8" plus you can move the rear insert to the back of the movable jaw for a total of 8-15/16" clamping. The keys provided look to be MIM parts but they work and you can always make 1/2" or 5/8" keys if you need to. Crazy good value. A++++++++++++. Oh, yeah, the holes on my table are 5-3/8" apart and the vise bolted down perfect with 1/2" bolts.