A tribute to the legend, half a century of glory crowned To COMMEMORATE THE 50th ANNIVERSARY OF THE KANMAIDEN BRAND, THIS LIMITED EDITION COLLECTIBLE TOOL is specially LAUNCHED.Engraved with the “50TH UNIVERSAL” badge of honor, it is not only a performance tool, but also a metal history book engraved with half a century of craftsmanship. Dual-standard accuracy, global standard Body length: 120mm / 4.72inches (accurately corresponding to the metric and imperial double system) Key components: 45mm / 1.77inches (strictly follow international general specifications) Full mirror polishing treatment, edge chamfering process to achieve millimeter-level precision card position Multiple application scenarios Industrial-grade accuracy testing: the preferred measurement benchmark for precision manufacturing Engineer collection gift box: with walnut display stand to highlight professional identity Laboratory standard reference: constant temperature steel to ensure that the thermal expansion and contraction error becomes zero Vocational and technical education: visual display of standardized work specifications