sledgehammer

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sledgehammer

a large heavy hammer with a long handle used with both hands for heavy work such as forging iron, breaking rocks, etc.

sledgehammer

[′slej‚ham·ər]
(design engineering)
A large heavy hammer that is usually wielded with two hands; used for driving stakes or breaking stone.

sledgehammer, sledge

A large hammer having two faces; weighs up to 100 lb (45 kg); grasped with both hands.