Akface Portable Air Compressor Pump 150 PSI, Digital Tire Inflator 12V DC Electric Gauge with Larger Air Flow 35L/Min, LED Light, Overheat Protection,Yellow

Features:
Pocket-sized, a lot of info on a tool of this size
From inch fractions, to inch decimals, to metric in increments
Useful conversions, long lasting etched printing
With scale for string height, for ridge saddle slot depth and for nuts saddles and polepieces
Perfect for obtaining accurate action measurements for electric guitar, bass and acoustic guitar

Specifications :
Material: Stainless steel
Color: As the pictures show you
Application: electric guitar, bass and acoustic guitar
Unit: mm/ in
Scale for string height: 0.01-0.14in / 0.25-3.50mm
Scale for bridge saddle slot depth: 0-0.875in / 0-20mm
Scale for nuts saddles and polepieces: 0-0.75in / 0-20mm
Ruler size: 8.9 * 5.1cm / 3.5 * 2in (length * width)
Ruler weight: 23g / 0.8oz

Package includes:
1 x String action ruler