Patent ID: 7266878

Claim:
An extension device for a punch-down tool to support a wire insert tool in an extended position and locked against both rotational and longitudinal movement, comprising: an elongated generally tubular body having a length of about one and one-half to four inches; the body having a lower driving end with a hollow cylindrical configuration upon whose outer surface a circumferential groove is formed, having a locking spring carried in the circumferential groove which extends around most but not all of the circumference of the driving end, and having at one point in the circumferential groove a single hole through the wall of the body, the spring also having an in-turned end which is adapted to engage the hole and become locked in it; and the upper end of the elongated body having formed in its exterior surface a longitudinal slot whose upper end portion is sloped to provide a ramp, the ramp having a peak, and whose lower end portion is indented to form a detent; such that if the upper end of the elongated body could be inserted into its own hollow lower end, the longitudinal slot would then receive and engage the inturned end of the spring, and when the spring end point passed the peak of the ramp it would then drop down into the detent and the two end portions of the tubular body would then be locked in place both rotationally and longitudinally relative to each other.