They provide a constant depth of cut and fewer blade changes.

它们提供了切不断深入和减少叶片的变化。

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Lock in the blade of hole cutter, to make sure that per depth is consistent.

锁于开洞器的刀片上，确保每次开洞深度一致。

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Lock in the blade of hole cutter, to make sure that per depth is consistent.

锁于开洞器的刀片上，确保每次开洞深度一致。

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