Radial Uppercut is a Blackrose Weapons item set awarded from Blackrose Prison. If you do so at Veteran difficulty, you will instead receive the Perfect Radial Uppercut set, which [verification needed — appears to be identical?]
Set pieces are Blackrose Style.
2 items: Uppercut deals 100% of its damage to one enemy near your primary target.
The set consists of Two Handed weapons in all traits. For detailed weapon stats and set values, see individual item pages by clicking on the links below.
While the description states that 2 items are required, this is because 2-handed weapons count as 2 items by themselves, so only 1 item is actually needed.