Designed and built especially for single speed bikes, the SS-15 is a forged, multi-purpose ride saver. 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.
15mm socket wrench for axle nuts
15mm open end wrench for pedals
Buying Guide - Handbook
What to look for and things to consider before you buy