Many people love the tri-ax and almost as many swear by the Pro 5.0. I'm in the latter group. The Tri-Ax has a twisted 'stance' more like the OEM, hense it's name, whereas the handle is tilted over toward the driver. The Pro 5.0 is shorter, straighter, with a steel handle, the Tri-Ax is aluminum. Both are quality units. But, we have both and my wife and I both prefer the Pro 5.0 in my GT.