outside fillets gauge with aligned zero point

This measurement tool is used to measure the outer corner (radius). Model matching SanLiang vernier caliper. However, for ease of modification, I have provided the original model file that can be used to match other brands of vernier calipers.The rounded corner gauge is equipped with a simple calibration plane to prevent improper placement of the caliper from affecting the measurement. When using, it is necessary to check whether the end face of the vernier caliper is flush with the calibration plane. At this point, the zero point of the caliper is exactly the vertex of the right angle being measured.The calculation formula has been placed on the surface of the measuring tool.