King Kong props take a beating

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$5.44 for ten pairs (Banggood):
Very hard to break these props, in over two months of regular flying I have only broken one, and it took a full-throttle punch out into a steel bar to do that. They are sold in sets of 10 pairs, which at the current rate I'm going through them should last 2 years or so... for $5 that's pretty good value!
The only slight down-side is that because the prop does not break, the lock-nut on the CCW motors (SS 2204 with very short output shaft) tends to loosen and fall off and get lost in the grass - perhaps I should add the cost of replacing lock-nuts to my two year cost calculation :)
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