Divers,
Yes they are knuckle busters(direct drive) they are gray. Ambas. had the same, they are 4000D & 5000D. They are all hard to fine!!!!!!!! The 4000D is brown and the 5000D is green, The d stands for direct drive. If you fined any grab them if the price is right. I hope this helps you, good luck.

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Tight Lines!!
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Tight Lines!!