Kraft Tool FC500E, Economy Adjustable Knee Kicker, Pack of 3 pcs Review June 30, 2018August 29, 2018 - LoudMandarin Economy Adjustable Knee Kicker Features: Economy Adjustable Knee KickerAdjusts from 17-1/2 to 21-1/2 long. Steel pins adjusts to depth of carpet. Adjusts from 17-1/2 to 21-1/2 long. Steel pins adjust to depth of carpet.