Description: GUITAR SETUPS & ADJUSTMENTS. This is a handy little project and is perfect to help guitar players, luthiers or guitarists setting up their guitars to improve playability. INCHES & MILLIMETERS. The tool includes scale for string action at 12th fret, string height scale, scale for bridge saddle slot, and scale for nuts, saddles and polepieces, in both inch and mm; all markings on the ruler are very clear and easy to read. MUTIFUNCTION. The tool is to help with string height, pickup height, bridge saddle height, saddle slot depth, fret slot depth and nut height, pickup polepiece height; applicable for electric guitar, acoustic guitar, bass, or other string instruments. WITH USER GUIDE. Features a string action setup guide sheet in the product and comes with a paper card instructions in English. HELPFUL AND EASY TO USE. With the string action gauge at hand, your guitar will be set up more accurately with less hit and miss effort. Specificatio