摘要 |
The invention relates to dental instruments of the type having a tool-receiving hollow shank. A tool clamping sleeve is provided in the shank, the sleeve being radially expansible in at least one area thereof on insertion of a tool shank therein. Annular spaces are provided between the sleeve and the shank and, in some instances, between the sleeve and the tool shank, to permit such expansion with effective clamping action.
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