This is a well made piece of kit that allows the foot-pegs to be raised, lowered, or moved front or back by a radial adjustment of 23mm. Mine are adjusted for full down to give my 6'-2" arthritic frame some knee bend relief. The parts are well made CNC 7075 aluminum billet items. Mine came with no instructions so I made them up as I went. I used medium threadlocker on both the offset adjuster and the pegs. The pegs are nicely angle cut on the bottom to minimize the amount of ground clearance that is given up. I have not ridden them yet, but compared to the stock foot-pegs with the feeler nuts on bottom, they don't look to suffer much - especially given that I haven't yet grounded the stock units. I did have to modify the stock return spring by cutting a bend off of it that interfered with the fold-up on the Thurn units. Here are some pics...