You need a grommet installation tool....

You need a hammer, a tube of Super-Gel, a variety of ground corn fried chips, and a medium sized short-haired gerbil. A hamster will do in a pinch. Oh the fun of 'Badge Day'! Twice a year in my house.

Well.... if it is just a little loose and you are brave.. I tightened the Keystone on my Acro with a ball peen hammer. You have to be able to "back up" the grommet with a solid backing.. like a block of wood on a corner of the work bench.. kind of hard to describe.. but hang the shell on the corner so the wood block is backing up the grommet.. rest the peen of the hammer on the badge side of the grommet. then give the back of the hammer a "smack" with another hammer so that the peen rolls the grommet tight on the badge.

OK OK... get a grommet tool.. :) but the ball peen hammer did work with no ill will toward the drum.

http://en.wikipedia.org/wiki/Ball-peen_hammer

You forgot the.....

You should never, never hit a steel hammer with another hammer. The two similar very tough materials will often chip and send pieces flying. An eye or two has been lost in this way. I'm sure you know this and there may be a detail or two missing from your procedure.....but for the sake of others reading.

Geez... don't hit it THAT hard!

It doesn't matter how hard you hit it....you shouldn't do it. Hammers are made from high carbon steel and drop forged, then hardened further on the hitting surface. So long a you are hitting a softer material....no problem. If you hit with the same or very similar material, they are prone to chipping. My dad was in the tool industry and this is something I was taught from a young age. You should put a block of wood between or hit with a rubber or plastic mallet.

Years ago I was on a carpenter crew framing a house. The forman was an a#$ hole who was always yelling. He was pushing us one day and one of the guy's made a mistake. He grabbed my hammer to hit his hammer with to take out a nail. I said you shouldn't do that and he gave me a dirty look, hit the hammers together and a piece of metal shot off hitting the guy next to me in the arm and in a vein. Blood was squirting everywhere. He was lucky that it didn't do any serious damage. Listen to drum dad!

Read up on metal working hammers a little..... you will find they are a little different animal than a carpenters claw hammer.

And no.. I don't wear a bike helmet either.. :)

signed..

Living on the edge,

Jim