This rare pickaxe skin is given to players for free if they are a Twitch Prime Subscriber. To redeem the item, you must have an Amazon Prime or Twitch Prime account and redeem it by going to https://www.epicgames.com/fortnite/en-US/twitch-prime-pack and following the instructions that follow to link your Epic account with your Prime Account. Once the process is complete, every item on the set will be given to the player including this rare pickaxe skin.
Instigator high-quality PNG images with transparent background to use them as you wish (YouTube thumbnails, skin concept and so on).
Used in-game to Shop and Locker, credit to Epic Games.