- All-purpose design: compact ruler keychain that fits everyday use for business and travel, always on hand for quick measurements. - Enhanced accuracy: clear, intuitive scale and easy-to-read display enable fast measurements with fewer steps, boosting everyday efficiency. - Wide application: versatile small ruler keychain suitable for precise measurements in crafts, sewing, model making, electronics, and other tasks. - Durable performance: wear-resistant material and a tough small ruler ensure sturdiness and safety for prolonged use. - Compact and portable: pocket-sized design that easily attaches to a keyring or fits in a small bag. - Use scenarios: - Crafts and DIY projects requiring precise measurements for parts, fabrics, or models. - Travel, packing, and shopping needing quick size checks for luggage, boxes, or products. - Office, workshop, and packaging tasks that demand fast layout checks and component placement.