Widow's Bite
The Widow's Bite is the nickname given to the electro-static wrist-mounted weapons used by members of the Black Widow programme. As well as a variant taser, they also include a grapple line capable of supporting the weight of up to two adults, and a garrott wire.
The Widow's Bite used by Natasha Romanoff has been upgraded and altered by Tony Stark and S.H.I.E.L.D at various times. As well as the capabilites of the typical Widow's Bites, it is capable of firing projectiles, including modified Anti-Gamma Arrows and gas pellets.