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Fractional. 3-Flats on shank to eliminate slippage. 135° split point for fast penetration and accurate starting without a center punch. Cryogenic treatment creates a more uniform “grain” structure by transforming retained austenite into martensite. Modifies the carbon micro-structure through precipitation of carbides increasing resistance to wear. Nitride process diffuses nitrogen into the surface to create a case hardening resulting in superior tool life and exceptional corrosion resistance. Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance. Type 130-CN. Made in USA.
Excellent for truck & trailer repair, and all MRO applications.