My experience with Spin Doctor is they use soft steels.

I tried their combo crank/pedal wrench to loosen a set of Egg Beaters (no flats) and the hex bit spun in the wrench body.

The good news is Performance will take almost anything back so it didn't cost anything to learn from this mistake.

Cheap tools are rarely worth buying since you end up buying the better ones anyhow after the cheap one fails.