Review on Hydraulic Battery Terminal Crimper Crimping by Alexander Scharon

It's okay, the metric dies don't match AWG at all. The only one that worked well was for #6 AWG. Same problems as everyone else. The jaw magnet closer to the handle is loose and falls out with every change. The dies themselves aren't very reliable and will move a bit before pressure is applied to them, so you need to keep them centered. The grip does not move very freely when inflated, it feels almost gritty. I don't expect it to last very long. It helped me with my project, made about a dozen crimps for #4, #6, and #10 wire. I'll probably never use it again as it does the job, just don't expect much, you'll have to crimp #4 twice and then cut off the bells before putting the heat shrink on top.