| 摘要 |
A hand-held screwdriver assembly having interchangeable blades which are held within a hollow handle and are available to be selected and moved through a cross-slot in a cap assembly on the handle to a stop position, and then to be secured in a chuck for use. Rotation of the cap assembly is prevented when the blade is secured in the chuck, thus precluding the introduction of a second blade into the cross-slot.
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