Shuriken
Throw it with right click. Half of the time you can pick it up again.
TIPThe Fabricator gives them an electric, toxic or fire mod.
Where to find it
Traders
4 scrap (x4) Tinkerer · Gadgetsin stock 85% of the timeContainers and finds (chance each time)
Distress drop crate13%
Vase (search)8.0%
Santa Bloater's gifts6.5%
Mailman (25% of the time)4.5%
Supply crate3.3%
Duffel Bag (search)2.6%
Cardboard Box (search)2.0%
Lucky Coin bonus on your kills1.1%
Trash Can (search)1.0%
An ally's bag (per zombie it kills)0.5%
Dropped by
Shuriken mods
Right click the Fabricator with shurikens in hand: the mod goes on up to 8 shurikens of the stack and works on every hit. The model does not change; the name and the description do, and a shuriken you pick up again keeps its mod.

Electric Shuriken
Electric Cable + 2 scrapEvery hit shocks 2 s, x2 if wet

Toxic Shuriken
Poison Leaves + 2 scrapEvery hit poisons 5 s

Fire Shuriken
Lighter + 2 scrapEvery hit sets on fire 4 s
WIKI

Linebacker
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Boomerang
Virus Bomb
Electric Bomb
Bowling Ball