INCH & METRIC BOLT GAUGE WITH THREAD PITCH GAUGE (L GAUGE) - 2 PIECES Measure Length - Inch - 3" and 9" Ruler, Metric - 75mm to 230mm Ruler Check Diamter - Inch - Checks Diameters from 1/4" to 1" Check Diamter - Metric - Checks Diameters From 4mm to 20mm Check Pitch - Inch - Thread Pitch On Side of Gauge, Metric - Thread Pitch On Side of Gauge Pack of 2 - 1 Inch L-Gauge (White) and 1 Metric L-Gauge (Yellow)