ITEM NAME:Durable String Action Guitar Luthier Tools Set Bass Radius Gauge Stainless Steel 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 for string action. 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, 4pcs notched radius gauges. Specifications: Color: silver Material: stainless steel Fitment: guitar, string instrument Package include: 1*string action ruler 1*thickness gauge 9*understring radius gauges 4*notched radius gauges 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, 4pcs notched radius gauges. 1 string action ruler. Each gauge is printed with a useful scale, easy to read. 1 thickness gauge.