Will Save Your Day-And A Whole Bunch Of Trouble
Don't wait until you have a broken tap to extract before ordering
some of these. At least have a No. 6 for 6-48 and a No. 8 for 8-40,
with extra sets of fingers on hand at all times.
Big Book Catalog, Issue:66, Page:470
SPECS: Steel body. Heat-treated steel fingers.