Calibration tool for Torque wrench

A simple tool to calibrate a torque wrench. I needed 3-5 in-lbs for an SMA connector.
I needed something to make sure that i will not over torque the SMA.
To i design the part to be 1inch from the center of the hex to the corners.

1. Print it
2. Use a kitchen scale - set it to lb
3. Put the calibration tool to the torque wrench and place it on the center of the scale
4. Press the torque wrench and see the desire torque