Park Tool Frame Alignment Gauge FAG-2 The Frame Alignment Gauge FAG-2 from Park Tool is a specifically designed device for accurate measurement of your frame's positioning, taking its reading with precision, direct from the drop out.Quick and Easy Alignment Measurement When your frame is off kilter with your wheels, shifting and tracking can often be impacted, lowering you and your bike's performance. Even after adjusting wheels and derailleurs, your frame may still not be in the right position. With the Frame Alignment Gauge FAG-2, you can quickly and accurately see exactly what realignment is required to straighten out the issue. Suitable for use on all types of bikes, the FAG-2 has a retractable pointer for making sure alignment is properly achieved on any size of bicycle. Features: Retractable pointer for use on all sizes and types of bike Accurate and precise alignment measurement, direct from the drop out Buy Park Tool Workshop from Chain Reaction Cycles, the World's Largest Online Bike Store.