1The gauge provides accurate measurement to string height, bridge saddle height, saddle slot depth, pickup polepiece height, fret slot depth and nut height. 2Stainless steel fret protectors in 2 sizes are specifically designed to protect the fingerboard while working on your frets. 3Mainly adopting stainless steel, anti-rust and durable. 4Widely applied for string instruments, such as guitar, bass, mandolin, banjo, etc. 5Very practical and useful, favorite measuring tools for DIY luthiers, guitarists.Features:The gauge provides accurate measurement to string height, bridge saddle height, saddle slotdepth, pickup polepiece height, fret slot depth and nut height. Stainless steel fret protectors in 2 sizes are specifically designed to protect thefingerboard while working on your frets. Mainly adopting stainless steel, anti-rust and durable. Widely applied for string instruments, such as guitar, bass, mandolin, banjo, etc. Very practical and useful, favorite measuring tools for DIY luthiers, guitarists. Specification: Condition: 100% Brand New Material: Stainless Steel Color: Silver Gauge Size(L * W * Thickness): Approx. 89 * 51 * 6mm / 3.5 * 2.0 * 0.2in Fret Protectors(L * W): Approx. 78 * 22 * 1mm / 3.07 * 0.87 * 0.04in(Large); 78 * 13 * 1mm / 3.07 * 0.51 * 0.04in(Small) Weight: Approx. 28gPacking List: 1 x Guitar String Gauge 1 x Set of Fret Protectors