Our carpet stretcher knee kicker features 4-section grip head with 16 adjustable steel spikes with 7-height adjustable settings up to 5/16". 5-3/8" steel wide head to ensure maximum grip on carpet. Handle telescopes allowing carpet stretcher to have 4-different length settings from 18-1/2" to 21-1/2" long in 1" increments. Includes extra large rubber bumper for added comfort and heavy duty rubber grip handle. Conveniently placed knob to adjust height of steel spikes. Heavy duty aluminum frame construction with powder coat finish.