525441-1 is a wire/slip gauge handtool designed for measuring and verifying wire sizes according to AWG (American Wire Gauge) standards. The gauge package includes a wire/slip gauge handtool, a storage box, and a certificate of calibration to ensure measurement accuracy. The tool features both GO (green) and NO-GO (red) size indicators for reliable wire size verification, with labeling that displays the wire size in AWG and corresponding measurement dimensions. This gauge is commonly used in electrical assembly, quality control, and wire preparation applications where precise wire sizing is critical for proper connector termination and electrical performance.