This inexpensive cable lug crimper is a hammer action tool requiring a solid base and a heavy hammer to make a crimp.  It has a spring loaded plunger to grip the lug before the hammer action completes the work.  It has an embossed reminder to wear safety glasses.  I dont need to tell you to also watch your fingers when using this tool.

 

Hammer action crimpers are one way for do-it yourself electricians to make inexpensive crimps.  They become tiresome if a lot of crimps are required but for a small project they offer one economical way to do your own crimps without investing in the $600 tool the pros use.