Purchased very inexpensively during a price dip (twenty something bucks). Excellent value for the money, and would not do the job again without it. I have used this several times on the tie rod of a BMW E46 330xi, which was otherwise extremely difficult to separate from the control arm. Use as described by others (grease up well, load up the joint, hit the arm with a hammer to shock joint loose). Without this tool you end up damaging the hex at the top of the threads and/or the threads themselves and/or the nut of the ball joint making re-use and future separations even more difficult. I will never do this work again without this kind of tool, unless I expect to use a pickle fork (and/or BFH) and throw away the ball joint afterwards. If purchasing again, I would get a 5-in-1 set set instead for double the price, mainly to get this tool and an Outer Tie Rod Remover (such as Gearwrench 3533, or OTC 7503, or Performance Tool W83021, etc.). Kit is GearWrench 41690, or comparable: Performance Tool W89303, or OTC 6295 Front End Service Set, etc.