Features: High quality materials, fine processing, durable and precision scale. There are 24.75" and 25.5" fret distance rulers, suitable for guitars with a distance of 24.75" and 25.5" from the upper nut to lower nut. Arc scale rulers(7.25", 9.5", 10", 12", 14", 15", 16" and 20"), with non-chord slot, narrow chord slot and wide chord slot, 6 arc rulers in all. Both the fret chord ruler and the arc ruler have a hole on it, which can be mounted on the key ring or hung on the tool hooks when not use. It is the perfect tool for guitar manufacturing and repair. Specification: Color: Bronze + Silver Material: Copper alloy + Steel Fret Ruler Size: Approx. 41.9cm x 3.7cm x 0.4cm / 16.4 x 1.5 x 0.2in Arc Scale Ruler Size: Approx. 8.8cm x 8.8cm x 0.05cm / 3.5 x 3.5 x 0.02in Arc Scale Ruler Types: Non-chord slot, 3.6cm Chord distance, 4.4cm Chord distance Weight: Approx. 291g Package List: 1 x Fret Ruler 6 x Radius Scale (6 Different Types) 1、High quality materials, fine processing, durable and precision scale. 2、There are 24.75" and 25.5" fret distance rulers, suitable for guitars with a distance of 24.75" and 25.5" from the upper nut to lower nut. 3、Arc scale rulers, with non-chord slot, narrow chord slot and wide chord slot, 6 arc rulers in all. 4、Both the fret chord ruler and the arc ruler have a hole on it, which can be mounted on the key ring or hung on the tool hooks when not use. 5、It is the perfect tool for guitar manufacturing and repair.