Flesh Knuckles

The Flesh Knuckles are a Hardmode accessory. They have a 1/5 (20%) chance to be dropped by the Crimson Mimic. It can be considered a late-game variant of Shackle and gives the most defense, not including modifiers, of any single accessory in the game. It has the same effect as Turtle armor, Beetle armor and Solar Flare armor, increasing chances of hostile mobs targeting the player. They are the Crimson biome equivalent to Putrid Scent, which has the opposite effect on mob aggression for the wearer.

Tips
Flesh Knuckles are a tanking accessory through-and-through and should be used by characters who plan to take and hold aggro from hostile mobs, particularly in multiplayer. They are an excellent accessory for users of Turtle or Beetle armor and pair well with other defensive accessories, such as the Paladin's Shield and Ankh Shield.

With Solar Flare armor, the Knuckles, a Paladin's Shield and an Ankh Shield it is possible to reach 95 defense through armor and accessories alone with no modifiers. With all Warding in an Expert Mode world where the character has 6 accessories, this increases to 119.

With a designated tank using Flesh Knuckles and one or more DPS-oriented characters using Putrid Scent it is possible to direct almost all damage towards one character. Paired up with a mage using the Spectre armor hood variant or Nebula armor one can deal with bosses and wave events very effectively through this single tank method.