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The 'hex shank' refers to the shape of the bit's shaft, which is hexagonal rather than cylindrical. This design was primarily introduced to address the common issue of drill bits slipping in the drill chuck. The hex shank provides a more secure grip, reducing slippage and ensuring better control during drilling operations. It also allows for quick and easy changes without requiring a key, saving valuable time on the job.

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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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