This knee kicker carpet stretcher rental comes with trigger lock adjustment. It has 16 pins that can be dialed to 16 settings in 1/32" increments to adjust for pile heights and desired penetration. The pins can be completely retracted to permit the use of the three nap grip inserts for lightweight or low pile carpets. The length of the kicker is adjustable in five positive lock settings from 17-1/2 inches to 21-1/2 inches. The seamless square foam filled bumper pad can be switched to four positions for even wear distribution. The weight of this carpet stretcher rental is about 4 1/2 pounds.