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THIS IS KNURLING ON METAL ..NOW REPLACE METAL WITH WOOD HARDWOOD AND YOU GET THE SAME EFFECT.AS THE KNURLS HAVE BEEN RAZOR SHARPENED.http://www.youtube.com/watch?v=dTmv_kYimrI TRY DIFFERENT HARDWOODS AND SEE THE EFFECTS YOU CAN GET.ITS DIFFFERENT AND ITS UNIQUE.AND PEN MAKERS WHO MAKE TIMBER BARRELS THIS IS IDEAL IF THEY WANT TO MAKE SOMETHING UNIQUE AND DIFFERENT.BUT WITH IDEAS YOU CAN KNURL JUST ABOUT ANYTHING YOU WANT WITHIN REASON.
