Item Type: Thread Gauge_x000D_ Material: Stainless steel_x000D_ System: Metric/Imperial_x000D_ Size: Approx. R1-6.5mm / 0.04-0.26in_x000D_ Purpose: Thread gauge 1The exterior of the pitch gauge has laser engraving scales, accurate manufacturing, wear?resistant and durable. 2The imperial and metric scales are clear at a glance, and can measure more screw thread pitches. 3Press the tooth gauge at the notch to be rotated and pulled out, easy to operate, and easy to carry and store. 4Made of stainless steel, high strength, polished and chrome?plated exterior improves rust resistance. 5The size range is R1?6.5mm, which can measure different pitches, with high accuracy and strong practicability.1 x Thread Gauge