From Lexicanum

Zagstruk is a disciplinarian Stormboy Boss.

He leads a squad of Stormboyz called the Vulcha Squad. He has a famously bad temper and his squad are usually more scared of his temper than their enemies. His squad get their name from his personal aircraft, Da Vulcha. Zagstruk has Bionik legs known as Da Vulcha's Klaws, made for him after a Space Marine Dreadnought ripped off his legs.¹

Sources

• ¹:Codex: Orks (4th Edition)