MUSICNOMAD Fret ROCKER+ MN822 Check Fret Condition

The 5-edge design allows you to accurately diagnose balanced weight and fret uniformity. It features four straight edges (1.25", 2", 3", and 4") that can be used for most instruments. It can also be used to check string action and pickup height. Made of high-quality stainless steel, the numbers and lines will not rub off. Each corner is smoothly polished to prevent sharp edges from scratching your instrument or your hands.