Hex Key Handle

This print implies key integration during model printing.
When the model is printed at 62-65% (depending on the size of the model), before the layer of solid fill, you need to put the key in the groove.
For simplicity of this action, it is better to reduce the printing speed to a minimum or suspend printing so that the part does not move or become deformed.
After the first continuous layer, you can resume printing at normal speed
Different keys are hitting, in some places the short side of the key is beating longer, I was grinding it on the workbench.

The number in the name STL, corresponds to the thickness of the key along the edges
I have several different keys in the key, they fit the same model