3/16 in. Quick Change Drill Bit with Hex Shank (12-Pieces)

Killer Force Drills (KFD) have a heavy duty 135 degree split point; Self - centering and you use less pressure to start and finish your job. Excellent for stainless Steel and other high tensile strength materials. Example: Titanium and Inconel. What is Inconel? Inconel is a family of austenitic nickel-chromium-based superalloys. Inconel alloys are oxidation-corrosion-resistant materials well suited for service in extreme environments subjected to pressure and heat. When heated, Inconel forms a thick, stable, passivating oxide layer protecting the surface from further attack. Inconel retains strength over a wide temperature range, attractive for high temperature applications where aluminum and steel would succumb to creep as a result of thermally induced crystal vacancies. Inconel's high temperature strength is developed by solid solution strengthening or precipitation hardening, depending on the alloy.

Got a set of these bits. They are designed for quick change and that part works well. These bits are built with two pieces. I tried to drill in hard metal which they say they are supposed to do but I went through two of the bits. Both the bits broke before I could get the holes drilled. I'm sure they would probably work OK with wood or a softer metal.

There are a couple of sizes I use a lot. I primarily use my impact driver so having the ¼” Hex Shank makes it quick to change. Because they have a 135° split point they are supposed to self-center when drilling, so far they has be true for me. Most of what I’ll be drilling into is mild steel and some wood, so I’m hoping they’ll last a long time since they’re designed to drill into stainless steel and hard metals. I like to keep several on hand so if I have a problem on a job site I can just can change out. When I get back to the shop at night or in the morning, I’ll take some time to sharpen them.

1/4 in. Quick Change Drill Bit with Hex Shank (12-Pieces). Made by Drill America. I like the way it handled, Made of Very hard metal, it only took me seconds to bore thru steel with speed and ease. It also keeps itself center with no problems, I could keep going without having to worry about the tip of this bit getting rounded anytime soon. Plus the Hex shank is a perfect fit for my impact driver. Yes, I would recommend it to my friends.

I have used them very little, but it seems that they are of good quality, also for the very affordable price...thank you

These bits work great for pre drilling metal. If treated correctly, we have drilled over 1000 holes with one bit