<p><b>Description:</b></p><p> Hook Calibration Tool: A professional bike frame drive hanger calibrator that can measure and correct misaligned drive hangers.<br>Ease of use: The directly into the derailleur hanger. The gauge rod holds a gauge to mark the distance to the wheel.<br>Applicable: It is used to replace the lifting lug after correction, and solve the problem of , especially the rear system.<br>High quality material: high quality aluminum alloy material, exquisite workmanship and high precision.<br>PERFECT GIFT: A practical gift for lovers.</p><p><b>Specification:</b></p><p>Material : aluminum alloy<br>Size ( L ): Approx .<br>40cm/15.75inch</p><p><b>Package Includes:</b></p><p>1 Bike Derailleur Hanger Gauge</p><p><b>Note:</b></p><p>Please allow slightly errors due to manual measurement and different monitors.</p><p><span style="font-size: 16px;"></span></p><p><span style="font-size: 16px;"></span></p><p><span style="font-size: 16px;"></span></p><p><span style="font-size: 16px;"></span></p><p><span style="font-size: 16px;"></span></p><p><span style="font-size: 16px;"></span></p>