I got this vise after having a bad experience with a KURT style chinese knockoff that cracked at the back of the casting.... So i decided when i get this one, i wasn't going to be gentle in testing to make sure it does what a vise does. Hold stuffBoy, does it do that, i reefed on it hard enough to indent 1" 1045 steel and it didn't care. The screw didn't bind up and backed off fairly easily to loosen the monstrous grip.My biggest gripe is that my milling machine has smaller t-slots and this only has hardware for a bridgeport style t-slots and i need a bit smaller. I fixed the vise to the table using Toe Clamps which seem to work out fine and for that i wish it had a full length 3 hole fixture to fix it to the table snuggly (i'll just build one).What i really like so far is that the casting is smooth and ground all the way around, so it would be REALLY hard for them to hide things like casting voids with automotive body filler.The ways the jaw slides on seem a bit soft, but the jaws are incredibly hard. Overall, it is a good product and if you need a vise that is acceptably accurate, but incredibly tough - this thing won't treat you wrong