PARK TOOL DAG-2 Derailleur Alignment Gau

Gauge bar made of heavy gauge, chrome plated steel
Adjusts to fit 20” to 29”+ wheels
Replaceable threaded tip
Upgraded, large inner shaft for added strength
Tighter tolerances for improved accuracy over previous models
Improved clearance and reach to fit more frame/hanger combos including low clearance thru axle derailleur hangers