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Operator was using a 2 pound sledgehammer to remove a worn tooth from an excavator bucket. When the operator hit the worn tooth (one time) with the hammer, a metal shard broke off of the worn tooth and passed through the operator's pants and the top of EE's leather boots before penetrating the operator's left leg, just above EE's ankle.

While observing another miner removing teeth from an excavator bucket from approximately 5-6 feet away. The injured miner was struck in the hand by a shard of metal (approximately 4mm X5mm) that broke off of the excavator tooth.