Fits for most of popular bicycle, mountain bike, road bike. - Can be used flexibly in the narrow space. Besides, can be used for pedal rear hub. - Remove and install nuts on the bike axles easily. - A necessary tool for outdoor use 13/14 mm and 15/16 mm sizes to fit most axles - One cone spanner for adjusting hub cones to eradicate bearing play - Slim design fits narrow lock nuts - For easy adjustment Double ended dual sized cone spanner Ideal for home or professional bike mechanic Ideal for wheel axle adjustments Material: carbon steel Size: 13/14/15/16mm Color: as picture shows Package includes: 1pc Hub cone spanner