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 problems
Gauge bar made from heavy gauge, chrome plated steel
Updated with tighter tolerances for improved accuracy
Adjusts to fit 20" to 29"+ wheels 
Upgraded, large inner shaft for added strength
Replaceable 10mm x 1 threaded tip
 Improved clearance and reach to work on more frame/derailleur hanger combos, including low clearance thru axle derailleur hangers
Made in the USA and covered by Park Tool's legendary limited lifetime warranty