I bought this device because it was going to speed things up and do both jobs with the 1 tool. Unfortunately it does not, the grommet press is ok, not very precise but ok. The hole punch is very poorly made, the pin is not machined, it is just stamped and is blunt as a result; it is also too small for the hole and simply does not work. I would not recommend this tool or this seller.
Perfect for attaching 5mm eyelets. Easier to use than a hammer and punch. Perfect if you use 5mm eyelets on a regular basis.