| 摘要 |
A screwdriver extension includes a supporting plate, a transferring part, a transmission shaft, and a receiving sleeve. The transferring part includes a housing and a plurality of meshed gears mounted in the housing. The supporting plate connects the transferring part to an electric screwdriver. The transmission shaft is driven by the electric screwdriver and drives the gears, which in turn drives the receiving sleeve. The sleeve receives a screwdriver head. The screwdriver extension helps the electric screwdriver to tighten screws along axes of corresponding holes.
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