| 摘要 |
A rotary tool includes a tool holder, a reversible bit, and an outer guide sleeve. The tool holder includes a socket and a shank. The socket includes an opening extending rearwardly from an end thereof. The shank is integral with and extends rearwardly from the socket and includes a non-circular cross-section. The reversible bit includes an inner sleeve, a first reversible bit driver, and a second reversible bit driver. The inner sleeve is disposed within the socket and rotates with the tool holder. One of the first and second bit drivers contains a bit having an end extending axially out of the socket opening. The outer guide sleeve is slidably coupled to and disposed over the socket. The outer guide sleeve is displaceable from a first position where a portion of the bit end extends outwardly beyond a first end of the outer sleeve to a second position where the bit end is completely disposed within the outer guide sleeve.
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