To provide a hand-held power tool with an extension handle capable of more easily attaching and detaching the extension handle when putting on/off the handle on a grip of the hand-held power tool, and the extension handle of the hand-held power tool.

The hand-held power tool having the grip and the extension handle which can be detachably put on the grip of the power tool are provided. The extension handle includes a pole, an attachment provided at one end of the pole and attached to the grip of the hand-held power tool, and a handle provided at the other end of the pole, thereby forming the hand-held power tool with the extension handle. A coupling between the pole and the attachment of the extension handle is made rotatable.

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