The DAG-2.2 is an indispensable shop tool that can be used to both measure and straighten misaligned derailleur hangers, solving a high percentage of shifting problemsGauge bar made from heavy gauge, chrome plated steelUpdated with tighter tolerances for improved accuracyAdjusts to fit 20 to 29+ wheels Upgraded, large inner shaft for added strengthReplaceable 10mm x 1 threaded tip Improved clearance and reach to work on more frame/derailleur hanger combos, including low clearance thru axle derailleur hangersMade in the USA and covered by Park Tool's legendary limited lifetime warranty