Fallout 3 deathclaw gauntlet?

How much damage does this weapon do, and where are the places I can get it? What stuff do I need to build it? It looks like a sick weapon.

It's a craftable weapon. It only shows up pre-crafted that I recall in The Pitt DLC.

Fallout Wiki has more information: http://fallout.wikia.com/wiki/Deathclaw_Gauntlet

You can get the schematic doing the side quest for bannon in rivet city. I don't know how much damage it does, but the reason that it's so good is because it ignores ememy damage resistance.

Deathclaw Gauntlets:
Damage: 26

Schematic Locations:

1. Do the quest about the Council in Rivet City.
2. At the F.Scott Key Trail & Campground; in a trailer, guarded by a Deathclaw.
3. Randomly encountered Wastelander will have a schematic on him.

"Ingredients"

-Wonderglue

-Leather Belt

-Deathclaw Hand

-Medical Brace

*Note: Getting a Deathclaw hand will be fairly tough at low levels.