The Floordot F1 Premium Knee Kicker delivers a great punch! It’s unique design transfers force more efficiently from the knee to the carpet, and requires 30% less effort to move carpet. And it’s quality 3” buffer means ultimate knee protection too. Premium streamlined Knee Kicker shifts carpet more efficiently. Unique design transfers force direct from knee to carpet. Requires 30% less effort to move carpet. Quality 3” buffer for ultimate knee protection. Strong robust construction. Unique positive length adjustment is fast and secure .