23.00mm Cobalt Drill Bit with 1/2" Reduced Shank, D/ACO - High Performance & Durable Cutting Tool | Drill America Refurbished Torches & Gauges I haven't had any issues

I haven't had any issues since installing these arrestors

Enhance your safety and performance with the Drill America - 4 x 1/2 x 1-1/4 45 degree Left Hand Single Angle Cutter

Size: m19 x 2

Choose the Drill America - 1-3/4-16 UNS HSS Tap Set for unmatched reliability and performance

Why Choose Drill America - 5 x 1 x 1-1/4 60 degree Right Hand Single Angle Cutter

23.00mm Cobalt Drill Bit with 1/2" Reduced Shank, D/ACO - High Performance & Durable Cutting Tool | Drill America Refurbished Torches & Gauges I haven't had any issuesCobalt 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 expand the size