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These are professional-grade, drop-forged alloy steel combination sheet metal snips manufactured by the Diamond Tool and Horseshoe Company in Duluth, Minnesota. The "DC" designation stands for Duckbill / Combination pattern, engineered to cut both straight lines and curves smoothly.
Given the style of the "Duluth, U.S.A." stamp and the specific diamond horseshoe logo, these tools were likely produced between the 1950s and 1970s, a period when Diamalloy tools were highly regarded for their top-tier metallurgical durability.
Diamalloy DC-7 : 7-Inch Lightweight Duckbill Snip• Used for intricate curves, radii, and fine detail metalwork.
Diamalloy DC-12 : 12.5-Inch Heavy-Duty Duckbill Snip• Used for primary cuts, long straight lines, and heavy-gauge sheet metal.
