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Unique sharp cutting edges design
Special edge design
reduces vibration and improves surface quality
Fine knuckle-type teeth design gives super fine and short chip
Add cooling holes on the basis of general purpose type
G-D938-A12C SHANK 12D Internal Cooling Twist Deep Drills for Steel 12D Specification:G-D938-A12C-0940 Unique sharp cutting edges designD938 Series Deep Hole Internal Coolant Twist Drill Suitable for efficient drilling of steel, cast iron and stainless steel New substrate material, perfect balance of toughness and wear resistance Using AlTiN nano coating and unique post processing of coating Optimize groove profile and drill point design, with super self centering performance, chip breaking performance and good chip evacuation performance
