I use this 8-ton Hand crimper kit from Harbor Frieght - AMAZON - Ebay - Cost around $60
I also order all of my 4AWG ANCOR Brand Marine Quality cable from EBAY Stores in 25-foot spools for around $50... I use the ANCOR Brand ring terminals from same ebay stores.
I will slip these adhesive type heat shrink ends on the cable assy before I crimp on the ends and this seal up the ends just great.
I also have a heat shrink marking tool kit from my working days which allows me to install cable markers on the ends as well. Looks very Professional and first class cable sets.
Everything I install associated with the Battery Cables all connect to stud mounts so this was my professional install idea that I have been using over these years...
Roy Ken