Plunkett's Valid Points

Plunkett's Valid Points are a unique version of the Spiked Knuckles.

Location
Plunkett's Valid Points are dropped by Junder Plunkett at Arlington House in Arlington Cemetery. You must have the Lawbringer perk to get this item. The contract for his bounty can be found on the body of a Regulator nearby, though finding this is not necessary for finding Plunkett.

Repair
This weapon can only be repaired by merchants. In order to maximize efficiency with this weapon it is recommended to fully invest in the caravan traders, especially Crazy Wolfgang.

Uses
Even for a character potent in unarmed attacks, its usefulness is questionable. It is undoubtedly more powerful than the Spiked Knuckles, with a higher base damage, higher critical rate, and lower AP cost. However to obtain it the player must obtain the Lawbringer perk, an arguably useless perk (especially for evil characters). They also cannot be repaired by the player, only merchants can repair them. If the player has The Pitt (DLC) (and access to the Steel Knuckles), Plunkett's Valid Points are not much of an acquisition. It is a great weapon, but the cost to obtain and maintain it may be too high for it to be useful.

YouTube Videos
Fallout 3 Unique Weapon: Plunkett's Valid Points VfoyO9FfV-s