The Roberts 10-410 is an Adjustable Knee Kicker. The Roberts Adjustable Carpet Knee Kicker is engineered with extra heavy aluminum castings and industrial grade steel to provide rugged strength and durability. Double locking pins let you easily adjust the length from 19" to 23", while a high contour neck lets you maneuver over stretcher heads and poles. Its durable, powder-coated finish ensures lasting use. This knee kicker is great for the DIY'er or infrequent installer.