Squirrel Hook

The Squirrel Hook is a pre-Hardmode grappling hook sold by the Zoologist for at any time. It launches a single hook that reaches 19 tiles, and functions identically to a normal grappling hook, but will also attach to the trunks of Trees and Giant Glowing Mushrooms.

Trivia

 * Early in development, it was planned for hooks to grapple to trees normally. However, this feature was later scrapped, because Redigit found that it "interfered with gameplay in an annoying way". This feature has since been added as the Squirrel Hook's unique feature.
 * The tooltip is a reference to the episode Up a Tree, in which the phrase is chanted repeatedly by a squirrel.