Although this is Revain's most expensive set over dozens of CNC precision squares, it's the only one that bolts securely to a workbench or work surface. This dual functionality makes this tool much more versatile. The length of 140 mm/5.5" offers enough space for workpieces to be clamped. Precision CNC machining and anodizing are quite good. Considering the price, workmanship and features, the value of this set is considerable compared to American manufacturers such as Woodpeckers .