1、Made of high quality metal material, durable and long service life. 2、Provides precise and accurate measurements not only for string action, but can also be used in measuring nut height, string to pole distance and fret slot depth. 3、Each gauge is printed with a useful decimal and conversion chart. It is easy to read so checking and adjusting string action will definitely be a breeze. 4、It helps you hit the right chords perfectly without stressing your fingers. 5、Keep your stringed instruments in top playing condition with this simple and versatile tool. Features: 1. Made of high quality metal material, durable and long service life. 2. Provides precise and accurate measurements not only for string action, but can also be used in measuring nut height, string to pole distance and fret slot depth. 3. Each gauge is printed with a useful decimal and conversion chart. It is easy to read so checking and adjusting string action will definitely be a breeze. 4. It helps you hit the right chords perfectly without stressing your fingers. 5. Keep your stringed instruments in top playing condition with this simple and versatile tool. Specifications: Material: Metal Size: 9.00*5.00*0.10cm/3.54*1.97*0.04in(Approx.) Package Included: 1 x Guitar String Action Gauge