Dangerous things to carry (6)

I believe the answer is:

knives

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'dangerous things' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for knives that I've seen before include "Weapons" , "Cutters" , "Cutting tools" , "Blades" , "Cutting instruments" .)

I've seen this clue in the Evening Standard.

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