This Carpet Power Stretcher comes with an adjustable locking head for various lengths of stretching. It adjusts from 35 in. to 22 ft. The Knob on head allows easy adjustment of power pins for various carpet thicknesses. The driving head has an adjustment for partial carpet stretches. The unit also comes complete with power head, 4 extension tubes in a tough, durable case with heavy-duty hinges, handle and double latches. According to professionals, this Carpet Power Stretcher is a solid product which ma carpet-stretching relatively easy owing to its adjustable head and foot that allows you to stretch at odd angles.