Unverified50% confidenceDecision RuleTime unknown
刀脊(刀背)必须为90度直角脊(spine)而非圆角，才能刮擦镁棒/火石打火。很多外形硬核但刀背倒圆的刀根本无法引火，购买前确认刀背是锐利直角
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Unverified刀背为90°直角处理，可直接击打火石打火，无需额外工具，但这也意味着刀背不能用于精细刮削类操作。86% similarUnverified刀背未做90度处理（出厂为圆角），无法直接用于刮打火棒，碳钢版用户常自行将刀背磨成直角以配合打火棒使用80% similarUnverified一体锻造(full tang)刀比拼接柄刀更耐用平衡好，看刀背延伸到刀柄末端且铆钉贯穿即为全龙骨结构，重刀切剁不易断柄77% similarUnverified整体一体锻造刀（full tang，刀身金属贯穿手柄）比夹片式或注塑柄结构更耐用、不易松动脱落，购买时看刀柄两侧是否有贯穿的金属条76% similar
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