The Arrow Inspector will check, with precise accuracy, arrow shaft straightness, broadhead balance and straightness, nock alignment and vane and feather balance. The Arrow Inspector features low friction machine cut steel axles and precision cut aluminum wheels - to detect even the slightest bend in an arrow shaft or unbalanced arrow. This tool is essential when gluing hidden inserts, outserts and nocks on carbon fiber arrows after applying epoxy so they can be easily aligned for perfect balance every time.