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The term 'rotary' in the name refers to the unique mechanism that sets it apart from other drilling tools. Unlike traditional drills, a rotary jackhammer employs a combination of rotation and hammering action, making it highly effective in breaking through hard materials like concrete, rock, and masonry. Its operational principle is based on a reciprocating piston, which generates a series of rapid blows, driving a chisel into the surface with immense force.

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A drill bit extension rod, as the name suggests, is an elongated shaft designed to attach to a drill's chuck, effectively lengthening the drill's reach. It is particularly useful when dealing with deep holes, tight corners, or overhead drilling, where standard drill bits might fall short. The extension rod allows users to maintain a comfortable grip and control while drilling, preventing fatigue and ensuring accuracy.

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