The texture pack is custom and is only 3d models for special items in game. Go to your server settings and change resource packs to "prompt". There is no name for it because it is custom and since 1.6.1 they are resource packs not texture packs.
Actually Slimefun has an api (its fun to work with) so it could be edited to work with it. Now cases and such are just not possible with the current clock items because the 3d are tools/weapons that are a different texture depending on their durability (thats why repair tokens break the models)...