Hand wheel to fit 3/8" bolt

I needed to secure a patio door and used a 3/8" bolt into a T nut pushed into the patio door and hidden underneath the existing hardware door lock plate (see photo). The only problem with my fix was I needed to leave a wrench by the door in case of emergency. By 3D printing a knob and pushing the bolt through it I could easily open and close the door when needed which in winter is not at all. It is nice that the bolt pulls the door against the weatherstripping making a nice tight seal.

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