Viking Black & Gold Super Premium Ultra Bor Mechanic Length 135º SP Type 258-UB 3/8" Reduced Shank: 15-Pc Set 1/16-1/2 by 32nds

Thank you for shopping with us!

Viking Super Premium Ultra Bor Mechanic Length 135º SP Type 258-UB 3/8" Reduced Shank: 15-Pc Set 1/16-1/2 by 32nds

• Special Hi-Molybdenum tool steel.
• 135° split point for fast penetration and accurate starting without 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.
• Heat treated at 2185°F and then nitro-carburize finished at 950°F to be measurably harder than high-speed steel.
• 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.
• Specially designed for hand-held drills.
• 3 Flats on Shank. Flats on shank give positive chuck-grip (3/16 and larger).
• Reduced shank with flats for positive chuck grip.