Bought 2 identical Aloris tool holders. One fit the pattern, the other didn't. The dovetail machining on one holder was not as deep as on the other and therefore did not slide on the tool holder. Apart from not fitting well, the finish is good, the hex head screws are typical of ship work which allows the hex key to slip (flip) when tightened. I regularly replace these screws with high-quality fasteners from the screw shop and have been using them successfully for several years. If you need a boring bar holder, remember that the 201 has a flat bottom to hold the tool in it, while the 202 has a groove on the bottom to hold a round boring bar.