Alta Brush
Alta Brush is a common tool.
Can be used once to excavate a fossil, with limited success.
Sources
Can be obtained via 
Spawnable Item Pack or 
Technical Information
- In-game ID:
ct_alta_brush - Power:
1.5 - Rarity:
Common - Tags:
alta,common,fossilbrush - File:
/items/active/alta/tools/brushes/brush/ct_alta_brush.activeitem