| 摘要 |
A dental tool device includes a rod, a pair of stops disposed in the rod, two protrusions formed on each of the stops, a tool having a stub engaged in the rod, and a block fixed to the stub of the tool, two cusps formed on the block, the cusps of the block are engaged between the protrusions of the stops when the block passes the stops and is rotated relative to the stops, the tool is disposable when it is disengaged from the rod.
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