The "D" refers to the cross-section of the handle, which resembles the letter "D".
Muddy water is best cleared by leaving it alone.
D handles suck for us lefties and should be banned as discrimination. I'm only half kidding too. I get tired of having right hand stuff forced on me just because there are more of them than us. And in the Japanese case, because left hand people are "shifty" what ever that means.
I've done that on a few that weren't glued down tight. I still think octagon is the way to go. Make everybody happy but the D-handle snobs happy.
Whoa, mike henry does d shaped handles now?