I have a Shars 440V on my rf30. The jaws are 4", but the vise opens to 6", which has come in handy many times. It weighs about 35 lbs, so it is not a major effort to move it.
6" parallels work fine, they stick out an inch on each side, but that hasn't been a problem.
6" parallels work fine, they stick out an inch on each side, but that hasn't been a problem.
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