I wasn’t sure where else to post this, but here’s Park’s offering. Seems more useful (since no one will ever use the Trixie’s spoke wrench and all that other junk), and should retail for around $20.
Designed and built especially for single speed bikes, the SS-15 is a forged spanner with a 15mm socket wrench for axle nuts, 15mm open end wrench for pedals, tire lever, and bottle opener. Just the right size and length (17cm/7") to take along or to wrench in the garage, the SS-15 is destined to be a single speeder’s favorite.