ITEM NAME:Guitar Measurement Tool Guitar Notched Radius Gauges for Guitar Bass Setup Description: Made of high quality steel material,durable,rustproof,practical. 1Set Guitar Luthier Tools Including Guitar Radius Gauge, String Action Ruler Gauge, 32 Blades Feeler Gauge, Guitar Notched Radius Gauges. Can provide the standard height reference value of various strings, as well as the effective chord length reference value for measuring the guitar fingerboard width and neck length. Gifts for guitar lovers, DIY lovers, etc. String Action Ruler Gauge:Approx.8.9x5.1x0.6cm/3.50x2x0.24in;Guitar Radius Gauge:Approx.8.7x8.7x0.4cm/3.4x3.4x0.16in Package Includes: 1Set Guitar Luthier Tools Note: Colors might be different due to different monitor display. Please allow slightly difference in size due to manual measurement..1Set Guitar Luthier Tools Including Guitar Radius Gauge, String Action Ruler Gauge, 32 Blades Feeler Gauge, Guitar Notched Radius Gauges. String Action Ruler Gauge:Approx.8.9x5.1x0.6cm/3.50x2x0.24in;Guitar Radius Gauge:Approx.8.7x8.7x0.4cm/3.4x3.4x0.16in.