An indispensable tool for any rider. The keys will eliminate any backlash in the bike if used wisely. The kit includes all the essential Allen keys for any bike repair. And their size will allow you to tighten any bolt with the necessary effort applied and you can easily take them along with you. The set includes 10, 8, 6, 5.4, 3, 2.5, 2, and 1.5 hex keys.