ITEM NAME:DIY Guitar Measuring Tool Set String Action Thickness Gauge Portable Luthier Description Made of stainless steel material, durable and reliable. Each gauge is printed with a useful scale, easy to read. Provides precise and accurate measurements not only for string action, but also can be used in measuring nut height, string to pole distance and fret slot depth. Suitable for measure string instruments such as electric guitar, electric bass, acoustic guitar, etc. Including 1pc string action ruler, 1pc thickness gauge, 9pcs understring radius gauge. Specifications: Color: gray Material: stainless steel Fitment: guitar, string instrument Package include: 1*string action ruler 1*thickness gauge 9*understring radius gauge Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow slight deviation for the measurement data and make sure you do not mind before ordering..Including 1pc string action ruler, 1pc thickness gauge, 9pcs understring radius gauge. 1 string action ruler. Each gauge is printed with a useful scale, easy to read. 9 understring radius gauge. Anyway we will try our best to avoid this kind of thing.