FRV Tools-2.1.jar is a release file of the Minecraft mod FRV Tools for Forge, made for Minecraft 1.18.1. It was published on January 6, 2022 and is 5.9 MB in size. For the full description, screenshots and every other version, visit the FRV Tools mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.