Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si DON'T PAY MORE FOR MULTIPLE TOOLS - This one tool measures string height AND locates high frets GREAT FRETWORK EASIER GUITAR PLAYING - Don't let your guitar get in the way of your creativity. A guitar free of fret and with low string action is easier to play and will let you concentrate on making music instead of fighting just to get clean notes UNLIKE OTHER TOOLS - This string height gauge is precision machined and accurate within .0005inch. Many of the off-shore made string height tools cannot even measure string height properly (Yes, we buy them to find out so you don't have to) YOU NEED A TOOL THAT IS DEAD FLAT - The only way to properly identify a high fret is to start with a tool that is perfectly flat. These tools are milled then checked on a machinist's plate to the edges are +/- .0005inch flat over a 12inch length Colour:Black Material:Stainless steel Size:10.3x5.2x0.1cm Package Contents: 1 x Fret Rocker Level Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.