The Pack Hanger Alignment Tool allows quick adjustments to be made to the derailleur hanger while on the trail or in the workshop. Alignment fixes are quick and intuitive, as you only need to adjust the hanger handle until it is parallel with the indicator rod. By using the bike's axle for reference, you don't need to be concerned with the wheel for making adjustments to the hanger. This new tool has included options for QR and thru axle. And for simple and durable storage, the components of this tool also nest inside of the handle. - Quick, easy deployment at the trailhead or workshop with all components ready to go inside the handle. - Tightening knob employs a clever rock-to-lock thread engagement that saves time while installing and removing. - Alignment is made by a simple, intuitive process of lining up the handle to the indicator rod. No turning the wheel or dodging spokes required. - Works on 12mm thru axle and 5mm quick release bikes