Features solid construction and reliability. Extra thick knee pad for your comfort, a wider head for improved load distribution, an exclusive non-slip hand grip and the solid dependable trigger adjusts 17 ½” to 21 ½”. High contour neck for use over stretcher head and poles and center grooved head for adjusting power stretcher head. This carpet knee kicker is the mother of all knee kickers. An Installer’s Choice. Made by Roberts.