After using this tool a bit I find that it is a good tool that creates good strong crimps. However, when using the A5 die for heat shrink disconnects, the barrel must face to the right and the disconnect to the left. If the barrel faces left and the disconnect right, the crimp fails as the crimp point ends up crushing the heat shrink behind the barrel. I have confirmed this with multiple crimps of 3M, Ancor, and Wirefy heat shrink. Minus 1 star for causing me to ruin a few disconnects because of incorrect instructions.