Since the anchor is pre-expanded

These are fully threaded hex cap screws (i

1-8 x 4 1/2 Grade 5 Hex Cap Screw Zinc Plated

They are actually stronger than most metal and chemical anchors because the all plastic plug bonds through friction to concrete

1/4-20 x 4 Combo Flat Sleeve Anchor Zinc Plated (50)

9/32 Cobalt Heavy Duty Jobber Drill Bit (12) 1-8 Grade 8 Hex Cap Screws Yellow Zinc Plated Since the anchor is pre-expanded9 32 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.