Mex
The 12 ton is limited to 1/0, the 16 ton should handle 4/0 as there are three die sets beyond the 120 size needed of 1/0. The 240 die set is a inch across the opening and 13/16 between the two dies when closed.
I'll dig up a mic and list the die sizes as they relate to inches/MMs.
I did ask the seller if I could buy the smaller die sets even though I have smaller crimpers. One I found on ebay as a "vintage" crimping tool, lol
clickI really don't want to buy 1/0 lugs at $5 each to test, nor do I want to waste much of the wire. 3/8's copper tube might fit 1/0, if not 1/2 inch will. come to think of it, cut it, clean it, tin it and either flatten and drill the end or keep recrimping the end down to a 2 gauge size for the controller and I'd have lugs.
The shipping weight of the tool is 9 pounds and the case is 3/4s of the size of the sawzall case. Here at the house the basement and garage are full of 30 years worth of tools and I have room. I wouldn't want to have to store two of these in a RV.