Best Spot weld drill?

We like the HF spring loaded type, the double sided cutter is good and works well, and you will rarely break the cutter, unless you get it in a very serious bind. The only thing I don't really like is the hex size, which is 7mm, but we have a few custom made extensions, for getting down in the hard to reach areas. When the center pin point get's dull, we just take it to the 400 grit sanding wheel and polish down to a very sharp point. If the center pin get's to short, Blair center pin's are the same diameter, and fit the shank perfectly. We did use Blair cutter's for many year's, but they kept making their double-sided cutter's, cheaper, and when you would get in a small bind (cutter's not heat treated properly) they would break. We like the Blair Rotabroach 3/8" cutter's, but they seem to be very pricey, like 30.00 for a pack of 3, and we do use them occasionally, and I will say, we have never broke one! I do kind of like the picture of the Dewalt drill set pictured, did not even know they made them, but may try'em sometime, and see how they work. We have spot drilled 100s of panels over the many years of buying part's car's, and building them also. Everybody here have a great day!!