Crain 520 Swivel-Lock Carpet StretcherThe Swivel Lock Stretcher gives you the benefits of both straight and swivel heads. The head has a 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. Also features a stretch lock button for partial