000 psi minimum is met for plain or zinc plated material

#11 Heavy Duty Jobber Drill Bit

3/8 x 4 Titen HD Concrete Anchor Zinc Plated (50)

The slots are on the end opposite the bearing surface

31/64 Cobalt Heavy Duty Jobber Drill Bit (6) 5/8-11 Socket Cap Screws 18-8 Stainless Steel 000 psi minimum is met31 64 Cobalt Heavy Duty Jobber Drill Bit . Heavy duty construction made to Type J aircraft specifications. Used for drilling holes in hard, tough materials such as stainless steel, titanium, high temperature and high strength alloys. High red hardness of cobalt permits speeds 30% greater than standard heavy duty split point (HSS) drills.