The 4Inch Pocket Brass Calipers are a compact hand tool designed for precise measurements of small objects in craft and precision work, including nails, screws, lenses, and tubing. Solid brass construction provides durability and smooth movement for reliable measurements over time Graduation in both imperial and millimeter scales supports flexible use across projects Imperial scale least count is 1/16' and metric scale least count is 0.1 mm, delivering precise results for a variety of tasks Vintage sliding gauge vernier caliper ruler features a classic appearance that complements detailed work Pocket size offers convenient portability, enabling measurement access in workshop, field, or travel settings Typical applications Quick verification of small hardware diameters such as nails and screws during assembly or fitting Measuring lens thickness or other small optical components for photography, eyewear, or precision equipment Checking the outer diameter of small tubing or cylindrical parts in DIY, model making, jewelry, or electronics projects Notes Designed for small object measurements with a focus on accuracy and smooth operation The combination of solid brass material and dual scale graduations supports reliable performance in a variety of everyday tasks