Multi-Function Calibration Gauge

This compact, all-in-one keychain is designed to help you test print tolerances, check dimensional accuracy, and ensure proper hardware fitment — perfect for quick measurements. It includes: • Angle measures: Quick visual references for common angles (10°, 15°, 30°, 45°, and 75°). You can also combine pieces to create additional angles. • Bolt Gauges: Quick fit-test for M3, M4, and M5 bolts. • Nut size gauge: Check sizes for M3, M4, and M5 hex nuts. • Step Ruler: A small ruler that may come handy when measuring quick, small things. Compact yet versatile, this keychain is an essential addition to any maker’s pocket.