I would be cautious of any traction devices.
My issues started in 2012 before my first back surgery. A Orthopedic doctor sent me for traction and my symptoms became worse after one of the sessions. I felt a pain while being stretched and think the nerve at my L3 in the foramen may have become pinched when traction was stopped at end of session. I went to a neurosurgeon after that for a new opinion of my issues. Get the MRI and get opinions before you do anything to make things worse or create another issue.
Traction may work for some but it depends on their lumbar pathology.