Guaranteed to outperform all uncoated cutters Super Speed Tip (SST) Core Cutters are made with state-of-the-art surface treatment technology that removes porosity during the fabrication processThis creates a perfectly smooth finish which allows for a better evacuation of material while drillingIt also helps to improve product life and reduce drilling time as it decreases friction with the work surface, which in turn reduces the amount of heat generated. Product Information Brand WALTER Part # 05A008 Line Corecut Diameter 1/2 Inch Origin Country CN Product Type Cutting Bits Size 1/2 Inch Product InformationM2Al modified HSS for extreme strength and flexibility Fully ground extra large flutes Modern tooth design and cutter geometry Special bronze SST surface treatment Weldon shank for easy and secure installation in power tools Suggested ApplicationDrilling 1/2" to 2 3/8" diameter holes in metal Drilling with magnetic drilling units Drilling with stationary machines