- Accurate measurement: A plastic vernier caliper designed for precise readings. An essential tool for jewelers, it provides reliable measurements for small parts and settings. - Wide measuring range: Sliding gauge measures up to 6 inches (150 mm), suitable for a variety of measurement tasks. - Vernier design for inside and outside dimensions: Lets you measure external diameters and internal holes or gaps with one instrument, improving versatility. - Easy to use and durable: Lightweight plastic construction with smooth sliding action enables effortless operation and repeatable results. - Practical applications: - Jewelry making and repair: measure ring sizes, bead holes, and component diameters. - Small parts and hardware: check outer dimensions and inner clearances for fittings. - Hobby and crafts: measure model parts, electronics enclosures, and other small components.