Alternative to Waldron punch and die set

I just ordered one of these sets from Micro-Mark.

What do you use for a hammer with them? Just a small ball pein, or does it have to be a brass or plastic hammer?

Thanks

I just finished doing a series of punches to see how clean the holes and the circles would come out.  Clean and free of burrs all the way down to the 1mm size.  I was also able to make washers at the 0.5mm thickness i.e. 1mm ID and 1.5mm OD without burrs although alignment is tricky at the small sizes.  At 2mm x 2.5 mm it's a piece of cake.

This one's a winner I think.