THESE ARE FROM A SMALL GROUP OF TAPS FROM AN AUCTION, 5/16 X 18 PH7 HSS METAL FORMING RH TAP
UNDER MAGNIFICATION THEY DO NOT APPEAR USED, BUT MOST HAVE DINGS FROM BEING LOOSE IN THE SAME BOX. I HAVE DISCARDED ANY THAT DO NOT LOOK LIKE THEY WOULD CUT. THOSE WE KEPT SHOULD WORK OK FOR GENERAL USE.