ITEM NAME:32 Feeler Guage Dual Marked Understring Radius Gauge For Guitar Bass Description: 32-Blades Feeler Gauge: 32 hardened, tempered steel blades, measurement from 0.0015 inch (0.038 mm) to 0.035 inch (0.889 mm), it is a guitar common spacing distance measure tool, chrome plated main shaft for easy clean up and professional look. Each piece of stainless steel piece of the feeler gauge has a marked scale for easy measurement.The metric and scales assist you in measuring the spacing. Radius Gauge: A set of 9 understring radius gauges including 7.25"-9.5"-10"-12"-14"-15''-16"-17'' and 20" radius. The high precision on these make the set up of the saddles a piece of cake and with great accuracy. Also the fact that both sides are precise arced make it great also for determening the fretboard and nut radius. These two guages can be applied to measure all kinds of electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard and more. Specification: Material: Stainless Steel Package Includes: 1 Piece Feeler Guage 1 Piece Radius Guage 1 Piece Keyring SKU: FUZ0025610678016196.Radius Gauge: A set of 9 understring radius gauges including 7.25"-9.5"-10"-12"-14"-15"-16"-17" and 20" radius. 1 Piece Feeler Guage. 1 Piece Radius Guage. The high precision on these make the set up of the saddles a piece of cake and with great accuracy.