T-Bar Row Attachment for your Power Rack. One of the most useful accessories I have purchased for my Powerline Power Rack over the years is the T-Bar Row attachment. Training upper back is one of my favorite workouts and I love the pump I get when I do rowing movements. What are T-Bar Rows? If you have never tried T- bar rows, you are missing out on a great mass builder for your back. It is a row that is…