not for repeated use 22-piece drill bit set
These drill bits are good for someone who is going to use them once in a while but I needed to drill 26 holes in 1/4" material , the first 7 holes were great but then even sharpening didn't help, I ended up going to my local hardware store and buying a cheap drill bit to finish with allthough it took two of the cheap bits to get the job done it was still cheaper then driving to sears and then spending the money to put the bit back in my set.
jrh
Nedrow, NY