Titanium Nitride coating resists heat and friction, extending the cutting edge life up to 6 times that of other high-speed step drill bits. Made from premium high-speed steel for increased durability. 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface. Rubber over-molded case has automatic indexing for easy bit access and identification. Removable cartridges are easy to carry to and from worksite.
Good point, I found the bits surprising when opening the hole. I ended up sharpening them all with a dr. Start right away, maybe a little less aggressively than before.
Pros
Molded rubber case features automatic indexing for easy bit access and identification. Removable chucks are easy to carry to and from work
I use these mostly every day (almost all wood actually) and they are great. They are and will remain sharp. Definitely an upgrade from the hardware store ACE drill bit set I used before.
Pros
135 degree split tip bit starts drilling right away with less effort and eliminates "walking" on work surface
I received a set of these drills a few years ago. I've never had to sharpen them (and I've built theater sets and props and drilled a lot). These are the best drill bits I've ever had (and a word to the wise: don't buy DeWalt bits). The common (but small) sizes 1/16, 3/32 and 1/8 are often lost or damaged. - This set has an extra size of these sizes.
Pros
The titanium nitride coating is heat and abrasion resistant and provides 6 times longer cutting edge life than other high speed step drills