PLANE
Defined as a massive, thick uniface with very steep to nearly vertical scraper retouch, presumed to have been used in planning wood and other hard substances. The flat ventral face will exhibit polish from use.
AKA: Core, Turtle Back, Tortoise Shell, Scraper-Plane (Rabot) 2 primary types (Flake and Core/Chunk )

Washington State
4.5" in Length
2.6" in Height