I used the heck out of the 3 and 4mm bits for 3 days straight; you could tell from the surface finish that I had used them, but the bits kept their shape, which is all I care about. I wish the magnetizing was stronger, a screw would sometimes drop when I held it all upside down with my driver; so I took away a star for that. I like that the surface finish is a different color than most; it made it easier for me to identify what was mine during and at the end of the job.
Rating:
[5 of 5 Stars!]