From the product description, check product page for current description, price and availability:
- Measuring Range: 0-6 inches/0-150mm; Accuracy: ±0.2mm/0.01in; Resolution: 0.1mm/0.01in. Smoothly slide the caliper to measure. Please remove the white insulation film on the battery before using.
- Press unit conversion button on the digital caliper to switch unit from inch (in) and metric (mm). The reading shows on the LCD screen clearly and quickly, ensuring easy reading to you.
- Conveniently measure inner diameter, external diameter, depth and thickness of the objects by using this caliper measuring tool. It is suitable to measure jewelry and other household objects.
- No need to calibrate the caliper. You can set any position of the ruler to zero by pressing ZERO. Convenient for measure different parts of the one object.
I use calipers around my home brewery to… measure things. 🙂 Including… fitting sizes, o-ring sizes [See: Bulk Keg Orings and Keg Repair Part Numbers]
Adoric Digital Caliper, Micrometer Caliper Measuring Tool, Auto-off Vernier Calipers with Inch/ MM Conversion, Large LCD Screen, 0-6Inch/150mm Carbon Fiber Gauge
Also: Nut & Bolt Thread Checker (Inch & Metric) – via Amazon