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4 Piece set. Fractional. 3 Flats on shank. Twice as hard as titanium nitride coating giving them 2 – 4 times the tool life of other tools. Improved lubricity for better performance in steel and aluminum. Type B78-ACN. Made in USA.
Includes sizes: 1/8 - 1/2, 1/4 - 3/4, 1/4 - 7/8, 7/8 - 1-1/8