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4 pieces. Fractional. 118° Split point for fast penetration and accurate starting without a center punch. Precision ground point, flutes, body, clearance and drill diameter for the ultimate in accuracy and performance. Body and clearance are gold surface treated for maximum lubricity.3 Flats on a½’’ shank. One piece solid construction.6” Overall length. Nitro-carburized Hi-molybdenum tool steel withstands higher drilling temperatures while maintaining sharpness. Type 130-AG. Made in USA.
Includes sizes: 9/16, 5/8, 3/4, 1. Norseman Drill reamers should be ran at 1/2 the R.P.M. suggested for a corresponding twist drill size.