I bought several of these hoping to make Christmas gifts. This particular stamp style doesn't work well on brass, it leaves a very faint impression. It is ok on copper but you still need to hit super hard and maybe do the tilt and tap. I am disappointed that I couldn't use them in the design I had in mind.
Must hit really hard!
These are really nice Monogram letters. You can get a really nice impression with a good wack from a 2lb brass mallet. There is no orientation markings on these stamps so I recommend marking them before you start. Some of them are a little tricky to figure out which way is up and the 'L' and the 'Z' look very similar. Overall I am happy with them especially since I bought them on sale.