The zinc body consists of a die cast zinc alloy

900 inches

3/4 x 12 Hex Lag Screw Zinc Plated

5/8-11 x 1 1/2 Socket Cap Screw 316 Stainless Steel

3/4-10 x 8 Grade 8 Hex Cap Screw Yellow Zinc Plated

15/64 Cobalt Heavy Duty Jobber Drill Bit (12) 9/16-12 Grade 8 Hex Cap Screws Yellow Zinc Plated The zinc body consists of15 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.