This telescoping connector allows you to sleeve 1/2" EMT conduit into 3/4" EMT conduit. The lower set screw secures the clamp around the 3/4" pipe, and the upper handle allows you to easily loosen to adjust the height of the inserted 1/2" pipe. These clamps are made of a high quality plastic rather than steel. They are perfect for lightweight projects that need adjustable pipes!
This is for my very simple first build which is just a stand alone telescoping pole to hold some plastic sheeting up for some household projects. This device is perfect for my design and very well manufactured. I ordered a few extra for future projects.