I was surprised recently when I went to sears for some brass punches, they were mail order only! I needed them to change a fuel pump (steel on steel around gas is a bad idea). I came up with a way of safely and with good control converting a steel punch to a brass one. The punch I needed was slightly smaller than .22 cal.. and what quality human doesn't have a ton of this brass just sitting around?!?! If you don't, ask a quality friend to take you to a gun range and it will likely be all over the ground (unless brass prices are really high). Now, I do recommend putting some dish detergent in the case to neutralizer any residual powder and clean it out with a q-tip, it would be silly to replace steel on steel with steel on gunpowder (that would go in the "don't do this" forum). It worked great and I didn't have to buy a rather expensive brass punch!