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Spiral point taps are designed for machine tapping through holes in a wide variety of materials. The point of the tap continuously ejects the chips ahead of the tap, eliminating chip disposal problems and thread damage. 3 flats on shank. Gold Oxide bits have low temperature stress relief that enhances lubricity, reduces friction and increases tap toughness. For foreign car, motorcycle, and machinery threading purposes. Type 21-AG. Made in U.S.A.