Barbed Hook
The Barbed Hook is a Fishing Tackle. Fishing Tackle only attached to the Iridium Fishing Rod. To attach it, pick it up, then right click on your Iridium Fishing Rod.
You'll get the Crafting recipe (1 Copper Bar, 1 Iron Bar, 1 Gold Bar) upon reaching Fishing Level 8.
You can also obtain it by winning the fishing contest at the Festival of Ice. It can also be contained in Treasure Chests found in the fishing mini-game.
1,000g from