Household scissors demonstrate how straight 15-20cm blades with micro-ground edges shear paper, cloth, or cardboard efficiently by minimizing fiber drag, unlike serrated types. Adjustable screw tension balances pivot resistance to prevent blade separation on dense materials, while hot-forged stainless builds resist micro-chipping better than stamped steel under repeated torque. Detachable kitchen models integrate nutcrackers or openers for leverage, but require post-use disassembly and pivot lubrication to triple lifespan before resharpening.
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