Why it matters: Tool steel affects durability, sharpening needs, and cut quality—shaping both your efficiency and final results. Carbide’s edge: Carbide withstands heat and wear, lasts longer in heavy ...

I've been thinking about buying one of these but I don't know if they are just a gimmick. Also, if they genuinely work well how good do your bits need to be in the first place to be worth sharpening?