XtremepowerUS Carpet Installation Knee Kicker With Adjustable Stretcher Maximum length: 21-1/2" and Minimum length: 18-1/2" Carpet end length: 4-7/8" and Carpet end width: 5-1/8" Telescope from 18-1/2" to 21-1/2" Knee kicker telescoping handle with four 1" increments adjustment holes Wide head grips using 2 replaceable grippers and 16 hardened steel pins