Flawless, real good quality at a reasonable price, everything went very well. We recommend the seller.

This is a solid step drill bit. I've used this bit 100 times on metal headers, power poles, stucco & other random surfaces. It has shown no sign of dulling out. I also like that it has a 1/4inch shank so it will fit in my impact drill when I don't have my hammer drill around.

For a clean finish on the holes, all you need to do is hit the back end with a bit to have that all-around clean look. I like them better than the regular drill bits.

Don't waste your money on any other brands. I did and it took me almost a half hour to drill a hole in a steel pot. I tossed that out the window and bought this Cobalt step bit. Drilled through that pot in 2 minutes.

Hands down, the best step bits. Drilled 120 holes through a steel barrel and it still goes through like a hot knife through butter. I got a lot more to go through, after reading the review I am super happy with the product.

After using many different Manufacturers & Models the Cobalt one is the best in terms of speed, durability, and build quality. The cobalt one is the sharpest & stays sharp the longest.

Years and years and years of using twist bits to drill holes in thin-to-heavy sheet metal. I'll never go back! No bit hanging up in the metal, no twisting bones out of place in my wrist, nice clean holes. Much faster than twist bits. I love them!

These are way sharper and stronger than the generic kit I destroyed, prompting me to order something better. They cut quickly and precisely. Fit right in my Makita impact.

The spiraling offset design between each step is genius! This keeps them sharp a lot longer than bits with steps that are adjacently spaced. These bits drill holes through metal like a hot knife to butter, quickly and accurately. A must-have set for installing toggle switches, LEDs, etc. into sheet metal, aluminum, and stainless steel.

So far they are doing awesome. For thin sheet aluminum and steel in vehicles, these drill through very quickly like it's nothing, and do a great job at evacuating shavings thanks to the Cobalt Step Drill Bit Set. For the value, definitely recommend mechanics and autobody.