Bests & Worsts Reviews from Amazon

As it comes out of the box it is quite stiff in its action - so much so that the metal pins can bend - or scratch the object - when trying to profile something. Lubrication didn't help. The tension is supplied by the two brass-colored caps with dimples on the ends that hold the whole assembly together. By CAREFULLY slipping a screwdriver blade under each end cap, both sides, both ends, and prying up a little at a time, you can adjust the tension so that the pins slide more easily. Be careful you don't pop the end caps off, I imagine you'd have a re-assembly mess on your hands... If you get the pins too loose you can just use pliers to press down the brass cap ends again to restore some tightness. But this won't be a problem if you just go slow and easy. Now I can use this tool to profile guitar necks and anything that is delicate or fragile or subject to scratching, without worrying so much about damaging it.