Professional Bike Frame Derailleur Hanger Alignment Gauge that can measure and straighten the misaligned transmission hanger, solving most of the shifting problems.<br> Strong and durable,Improve performance, to work on more frame/derailleur hanger combos.<br> Wheel replaceable threaded tip is improved after the large inner axle increases the resistance tolerance more strictly, improves the clearance accuracy and the extension range improved to fit more frame / handlebar combinations, including small clearance through the shaft transmission hanger.<br> For variable lug calibration for many speed variations, especially for post-position variable speed systems. An essential tool for cycling enthusiasts.<br> Made of aluminum alloy and stainless steel, durable and practical.<br> Specification:<br> Material: Aluminum Alloy + Stainless Steel<br> Size Chart:<br> Length: 430mm/16.93inch<br> Package Includes:<br> 1 Piece Bicycle Derailleur Hanger Alignment Gauge