加硬材料，颜色鲜艳，坚固耐用。锯齿纹钢铁锻造刃口，力量非凡，坚固耐用。

Long-lasting serrated forged steel blades for superior strength and durability. Hard, colored material for toughness and durability.

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木螺丝的性能与用途：热处理加硬后可达到8.8级以上。可从我厂直接出口到外国。

Wood screw's performance and use: After the heat treatment adds hardly, may achieve above 8.8 levels. May from my factory direct export to the foreign country.

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适用基材：加硬pc，加硬pmma, UV漆面，电镀面，不锈钢，石头，大理石，玻璃等。

Recommended substrate: harden PC, harden PMMA, the surface of UV coating, electroplating layer, stainless steel, stone, marble, glass, etc.

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The stuff that people tend to add sometimes is to keep drawing the 10 Newtons that's acting on that.

有人经常凭空添加的力,总是把这个 10 牛的力硬加在这个物体上

耶鲁公开课 - 基础物理课程节选