Abstract: A handle structure for a tool includes a handle body slidably secured on the shank of the tool for adjusting an arm of force of the shank of the tool. The handle structure also includes a retaining device mounted between the handle body and the shank of the tool for retaining the handle body on the shank of the tool, and a restoring device mounted between the handle body and the shank of the tool so that the handle body can slide on the shank of the tool.

Abstract: A handle assembly includes a handle body rotatably mounted on the shank of a tool, and a limiting device mounted in the handle body for use in limiting the amount of rotation between the handle body and the shank of the tool to a determined rotation angle so that the handle body rotated relative to the shank of the tool will not exceed a determined rotation angle, thereby preventing a user's hand from slipping from the handle body.

Abstract: A tool includes a shank, a handle slidably mounted on the shank and encompassing an outer periphery of the shank, thereby forming a closed state, and a positioning structure mounted between the shank and the handle for positioning the handle on the shank. The positioning structure includes at least one positioning portion formed on the shank, and at least one positioning body formed on the body. The positioning body may be locked and positioned on the positioning portion when the handle is compressed, thereby positioning the handle on the shank.