If you are talking about Steve Personalized Key chains I have cut a couple hundred using various hardwoods.
Cherry is my favourite but have cut maple, oak, walnut or anything I have scraps of. I make them about 3/8" or a little less.
My daughter is a principal and she has changed schools a couple of times and she gives them out to all the teachers at Christmas. I do about 3 - 4 an hour. One of the teachers wanted 25 for a family reunion and I charged $1 a letter min $5.