| 摘要 |
An apparatus for telescopically extending the shaft length of a tool including a handle with a circular or noncircular hollow core shaft with at least one longitudinal extension channel, a circular or noncircular hollow shank wherein one end has an internally threaded drive ring with at least one tab for insertion into an extension channel, and the second end has a head assembly to receive various tool fittings where an externally threaded adjusting rod extends into the hollow shank and is engaged in the threaded drive ring and is operated by a rotatable adjusting knob is attached to the adjusting rod, and a lock assembly is used to selectively eliminate rotation of the knob; the lock assembly comprises a pair of facing spline faces which engagingly prevent rotation of the knob.
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