Drill Bit; High Speed Steel; Letter/Black Oxide; Heavy-duty Jobber; 135° Split Point; Straight Shank; Size: 1/4 in.; Flute Length: 2-7/8 in.; Length: 6-1/8 in.; Series 500
Additional Info: Heavy-duty bits made to Type J aircraft specifications. Use for drilling holes in hard materials including stainless steel, titanium, high-temperature/high-strength alloys. High red hardness of cobalt permits speeds 30% greater than HSS drills.