Unior Hanger Genie, control gauge for derailleur hangers 1602/5

Hanger Genie - Alignment Tool for Derailleur Hanger 1602/5. The Hanger Genie is a slide-in tool for aligning derailleur hangers, making the shifting process precise. Compatible with all wheel sizes from 20 to 29 inches, it screws into the thread of the derailleur hanger. The high-precision feeler gauge can be fixed in place, allowing you to keep it in view from any working position. With the help of the pivoting arm of the tool, the derailleur hanger can be accurately aligned along the wheel.