Great value! Compared to other well-known brands, they are less than a quarter cheaper than others. Yes, maybe not that long, but very precisely. I am planning to build a dozen small doors and this will save me a fortune compared to buying prefab doors. I made my first two doors and am very happy with the results. The cuts are clean and the fit is perfect. I have also purchased cutters who remake this set for 5.2mm plywood. As you know, the quarter inch layer is actually slightly smaller. Version 5.2 leaves enough space for the glue. I plan to buy other Yonico bits for other purposes; Drawer lock bits and connector bits.