S & D-8SP : 92400 Description: Super Premium Silver and Deming Drill 1/2" Shank 3 Flats on Shank 8 Pieces 135° Split Point Type: 280-UB Sizes: 9/16 thru 1-Inch by 16ths Special Hi-Molybdenum tool steel. 135° split point for fast penetration and accurate starting without center punch. Sizes larger than 3/4" diameter have 118° split point. Precision ground point, flute, body, clearance, and drill diameter for the ultimate in accuracy and performance. Body and clearance are gold surface treated for maximum lubricity. Space age nitro-carburized steel withstands substantially higher drilling temperatures while maintaining sharpness. Recommended for use in work hardening grades of stainless steel and other hard metal drilling applications.