It can seem weird to spend good money on a capable drill just to end up chewing through screw heads, anyway. It is easy to assume the tool has too much power or the fasteners came from a bad batch of hardware, but I doubt it. Most of the time, the trouble comes down to how that little piece of steel meets the slot. For clean results, it helps to understand why loose fits happen and how even a tiny mismatch can wreck a job.
