Item TRAP8 4 Awg Crimper
I use a small chisel & hammer to drive the seam of the terminal into the strands then vise-grips or bench vise to squeeze it all together from the sides. Here is a quick overview and demo of this most handy wire crimper tool I've ever used. Click one of these links to buy from You Need This Tool - Episode 129 | Battery Cable Lug Crimping Tool ...