Wahey
I just heard the bloke on Shedheads saying "This screw has a ribbed shank"
It was like innuendo overload.
I really had to look it up on the interweb obviously and this is an explanation supplied.
"My intuition is that the quarter inch of steeply pitched fluting is designed to ream out the passage in the outer member being joined, or at least ream out the outer 3/4" of 'hole'. Conceivably, this might reduce friction when driving in the screw over the final 3/4""
The interweb is the best thing in the World ... ever
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