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Jackhammer is a member of the construction-themed group of super-villains known as Demolition Team. They began as adversaries to Green Lantern, but have plagued several other heroes over the years. He is a former oil rig worker whose special jackhammer allows him to deal great damage. Jackhammer was created by Len Wein and Dave Gibbons, first appearing in Green Lantern (Volume 2) #176. (1984)