Crain 520 swivel-lock carpet stretcher gives you the benefits of both straight and swivel head carpet stretchers. The head has 60° of free swivel for patterned carpet. Depress the built-in lock pin, and you can lock the swivel in 5 convenient positions. Lock in the straight position for square stretching, or at 15° for most angle stretching. There’s even a 30° setting for extreme angles found in “L” shaped living/dining rooms. It also features a stretch lock button for partial stretches. The pin depth adjustment bar allows for variable pin depth penetration for different carpet thicknesses. Adjusts with two screws in the pin plate. Swivel-Lock Carpet Stretcher comes with Auto-Lok Tube, 3 extension tubes, transfer tube, and folding tail block. Adjusts from 37 inches to 23 feet and can be lengthened with additional tubes. Crain 520 swivel-lock carpet stretcher available in the double case model only.