Designed to check guitar neck straightness of the fretboard and not just the frets.
One side is for 25.5" (Fender) scale guitars, and the other side is for 24.75" (Gibson) scale guitars.
Better Quality, thicker material than tools from China/ Made In USA!
6061 Aluminium- Nice Brushed Finish
Machined Edges for Flatness / Cheaper Tools Are Not