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EstimatedGenuine Milwaukee component.
Milwaukee 4931436150 replacement spare Hammer Impactor to suit M18 CHIWF12 and M18 CHIWF34 impact wrenches.
The hammer/impactor is the part that give the machine its name. The motor drives a cam shaft, which in turn drives the hammer/impactor and anvil. When the machine is put under load, the hammer/impactor is engaged with a heavy duty spring mechanism and causes the intense drive and rattle that impact machines are well known for.
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