Yautja Wristblades is a Legendary Fortnite Harvesting Tool from the Jungle Hunter set. Yautja Wristblades was first added to the game in Fortnite Chapter 2 Season 5.
To unlock Yautja Wristblades you must complete the Jungle Quest challenge - Spend 30s within 10m of a player as Predator.
According to leaker FortTory
"Appears as the Default Pickaxe when not equipped along with the Predator Outfit."
Seems like the pickaxe is only usable with the Predator himself.
Jungle Hunter Set
Yautja Wristblades is part of the Jungle Hunter set! You can find all of the items that belong to it below.