The standard Hydraulic Crimpers you get from China are in Metric / Millimeters and they work perfectly fine with Metric Wires, Lugs etc but trixy with AWG wires & lugs.
4.0mm = 12awg
6.0mm = 10awg
8.0mm = 9awg
10.0mm = 8awg
16.0mm = 6awg
25.0mm = 4awg
35.0mm = 2awg
50.0mm = 1awg
70.0mm = 2/0awg
The 70mm for 2/0 is NOT tight ! in fact you have to shave the dies a bit to make it really tight, 1mm off each side. OR you crimp with 70mm then again with 50mm to ensure a tight compressed fit BUT that leaves a pair of "wings" so keep that in mind. This also applied to the other AWG lust to varying degrees
The one I use is a Delixi 6-Ton. NOTE, The other type of crimper is BETTER than these closed models... Image showing better model also attached. There is also no need to go bigger than 8-Ton which will make perfectly airtight crimps with proper closed end lugs.
View attachment 191858
Better Model below
View attachment 191859