GutterScrew™ enables you to replace old popping gutter spikes once and for all

#3 Heavy Duty Jobber Drill Bit

1/2-13 x 12 Grade 5 Hex Cap Screw Zinc Plated

Coarse thread: 90

25/64 Cobalt Heavy Duty Jobber Drill Bit (6) 1/2 Hex Lag Screws 18-8 Stainless Steel GutterScrew™ enables you to replace25 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.