Synthesized 25.5” and 24.75” scale guitar, and precisely adjusted the distance of the notched, let it not just fit fender and gibson, also for others. Fit more guitars than other neck straight edge. | Use side of notched for fingerboard straightness check, and side of complete for fret wires levelness check. | Size: 16.9” * 1.2” * 0.08” (430mm * 30mm * 2mm); weight: 3.53 oz (100 g) | Made of 6061 Aluminium with nice oxidation blasting treatment. | Precise machined edges and laser engraving.