4"/100mm Adjustable double square. Graduation: EM. High quality with smooth travel. Accuracy meets Federal Specifications. Hardened chrome plate blades with scratching protection & smooth slide movement. Precision lapping on all measuring surfaces. Graduations: 4R (8th, 16th, 32nd, 64th); E/M inch/metric (1mm, 64th, 32nd, 1/2mm); M Metric: (1mm, 1/2 mm, 1mm, 1/2 mm). Square, Center, Protractor with sand enamel finish. Protective case included.
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