ENERTWIST Drill Bit Set, 112-Pieces 1/4" Hex Shank Impact Driver Bits and Screwdriver Bits Set Assorted in Tough Case for Wood Metal Cement Drilling and Screw Driving, ET-DBA-112

This unit comes with everything that you need. Every bit in the world even a countersink bit! Concrete, wood, metal bits as well. I haven't used them yet since I purchased them as a gift for someone else but I'm impressed with what is included and it has a nice case as well.

Puse literalmente 2 tornillos y se barrio la punta, las brocas de concreto no tienen filo

I still use it to this day but I must say the drill bits are not as durable as you want it to be.

So far so good, a few of the items had come out of there places and one of the holders was broken. No big deal for me as it will be in my toolbox so not much moving around.

Check the drill bits for defects. Two bits in the first order I received had tiny holes in the body of the bit . Great service. Received a replacement set later the same day of return.