ROBERTS Deluxe Adjustable Carpet Knee Kicker features a foam-filled seamless bumper pad for extra comfort, a center-grooved head to adjust the power stretcher head, and a non-slip, checkered hand grip. The trigger release easily adjusts length from 17" to 21" with a single button push, and has an easy-to-read pin depth dial that is also easy to adjust. Elevating the industry standard in knee kickers, ROBERTS Deluxe Knee Kicker has been in demand for over 40 years.