plustic-8.0.2.jar is an alpha file of the Minecraft mod xXx_MoreToolMats_xXx (a PlusTiC fork without the evil, and apparently some new bugs idk), made for Minecraft 1.12.2. It was published on October 18, 2020 and is 0.5 MB in size. Pre-release builds can contain bugs — back up your world before installing. For the full description, screenshots and every other version, visit the xXx_MoreToolMats_xXx (a PlusTiC fork without the evil, and apparently some new bugs idk) mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.