Patent ID: 7096768

Claim:
An extension rod assembly comprising: a base, in either end of which being axially inserted a replaceable rod and a tool head, on an outer periphery of the base formed a shoulder; a slide sleeve moveably mounted on the base and interiorly provided with an annular tube; a rear compression spring mounted on the tool head and biased between the shoulder of the base and the annular tube; a front compression spring mounted on the slide sleeve; a fixing ring mounted on the slide sleeve, and the front compression spring biased between the shoulder of the base and the fixing ring; a magnetic iron disposed at an end of the slide sleeve and provided for passage of the tool head; and so that when pushing the slide sleeve toward the tool head, the magnetic iron at end of the slide sleeve can provide a magnetic force to make the tool head pick up a screw to be screwed easily, besides, when pushing the slide sleeve toward the rod, the tool head will be caused to slide out of the slide sleeve, so as to facilitate replacement of the tool head.