I made an universal T bar handle as a one fits all solution. Since I didn't want to print a handle for every hex key, I made one that fits all the six sizes. You can easily switch between the keys.

The smallest hex key isn't perfectly centred but can still be used properly.

I was inspired by Kezat but designed the whole handle from scratch.

Creality

Ender 3 Pro

Doesn't Matter

No

50%

I would recommend increasing the wall thickness to 4.
For the nut, decreasing the XY Size Compensation by about 0.2mm for better fit.