There is inspection result data on accuracy, and reliability is high. The exclusive storage case is also solid, and the satisfaction level is high. However, it is regrettable that it takes time to understand for those who use this type for the first time that there is no explanation such as how to use the vice and its attention. There is a screw hole whose purpose of use is unknown today. Especially when using Vice there is no problem. It is too bad that the retaining part of the hexagonal wrench provided inside the case is in a state where it can not be held due to dimensional design mistake.