Abstract: The present invention includes a telescopically extendable pole including a first hollow cylindrical tube and a second cylindrical tube which is telescopically displaceable within the first tube. The arrangement for selectively locking the first and second tubes together at a fixed relative longitudinal position includes a locking member having first and second cylindrical end sections and a cylindrical center section which functions as a first camming surface. A second camming surface surrounds the first camming surface. Relative rotational displacements of the first tube with respect to the second tube causes the first camming surface to engage the second camming surface and the second camming surface to cause engagement with the inner surface of the first tube to lock the first and second tubes into a fixed relative longitudinal position.