For Adam's final tool tip of the year, he reads from an iconic yellow book: the mighty McMaster-Carr catalog. Not only is it an essential reference guide to the over half million products sold by McMaster-Carr, but its detailed descriptions unlock the utility for all manner of esoteric tools and hardware supplies. The printed catalog isn't easy to get ahold of, but thankfully the entire catalog is also online and in McMaster-Carr's mobile app!