21.00mm Cobalt Drill Bit with 1/2" Reduced Shank, D/ACO BoltsandNuts.com Drill Bit Size: 5/16"

Drill Bit Size: 5/16"

Zinc Yellow Finish

and reducers are made out of 4140 steel and have a corrosion-resistant manganese phosphate coating • Carrying Case – Made from a high-density polyethylene material that withstands exposure to common lubricants

• Save Drawer Space – Organizer rack keeps pliers upright and organized

Internal Diameter: 7/16"-20

21.00mm Cobalt Drill Bit with 1/2" Reduced Shank, D/ACO BoltsandNuts.com Drill Bit Size: 5/16"Product Description Cobalt drill bits are are effective in drilling tough, high tensile strength materials such as cast iron, inconel, stainless steel and titanium. They display high red hardness, permitting speeds up to 30% greater than with conventional M2 high speed steel. They have a 135 split point tip for fast penetration and accurate drilling. Compared to a conventional 118 degree tip, these drills wont go "walking" on you. Reduced Shank Drills