| 摘要 |
A hand tool includes a handle sized and provided with an outer shape and finish to be comfortably grabbed and manually turned, and a shank extending from one end of the handle coaxially therewith. The shank is formed with a chip-engaging free end portion in the form of self-threading or self-tapping threads that continue to and terminate in a point at the free end thereof. A pile of chips at the bottom of a blind tapped hole is removed by inserting the free end of the threaded shank into the hole until the chips are encountered, turning the tool while applying a slight pressure such that the free end of the tool threads into the pile of chips, and then pulling the free end of the tool from the hole to remove the chips threaded thereon.
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