From the Introduction:
This supplement provides additional options for equipment, adventuring gear, and other items for play under the Basic Fantasy Role-Playing Game rules. If you do not already have a copy of the Basic Fantasy RPG rules, please visit the website and download a copy.
The purpose of this supplement is to provide a single source for expanded equipment, as well as provide some guidelines for other materials, goods, and services of which players may find themselves in need. As with any supplements, these are suggestions, and GMs are encouraged to pick and choose what they want to use.