Precision measuring for delicate items: this sliding gauge measures inside, outside, depth and height up to 150 mm, providing meticulous accuracy for jewelry, antique collections and school projects. Complete double scale system: features clear centimeter and inch markings on a dual scale for versatile readings, with a total tool length of 210 mm for handling various measuring tasks with ease and confidence. Plastic construction: crafted from durable plastic, this caliper is lightweight for comfortable extended use while remaining sturdy enough to provide reliable measurements. Wide application range: suitable for measuring depth, height and diameter in multiple scenarios including jewelry measurement, woodworking, school exhibitions and delicate antique assessments. Practical use scenarios: Jewelry measurement and : accurately measure inner and outer dimensions, depth and height of rings, clasps and settings. Woodworking and crafts: quick checks of depth, height and diameter of small parts, dowels, grooves and fittings. Antique assessment and education: verify dimensions for cataloging, displays and school projects requiring precise dimensional data.