For high tensile steel, fits in a 1/2" chuck SST+ 1/2 Inch Prentice are heavy-duty large diameter drill bits for use in portable drills, drill presses and magnetic base drills with 1/2 Inch chuck capacityTheir extra hard tips allow for the drilling of many more holes between re-sharpeningsThey are made with a cobalt blend for longer life. Product Information Brand WALTER Part # 01M553 Drill Size 53/64 Inch Flute Length 3-1/8 Inch Length 6 Inch Origin Country CN Product Type Drill Bits Shank 1/2 Inch Size 53/64 Inch Product InformationMade with premium grade cobalt HSS to drill harder materials Self centering 135 degree split-point for reduced thrust requirements and minimized walking Cobalt drills can drill approximately 30% faster than HSS drills Special bronze SST surface treatmeSuggested ApplicationDrilling holes in high strength materials Heavy-duty drilling Drilling large diameter holes Drilling with handheld power tools
