5 mm hex key T-handle

There's already a bunch of hex key handles out there, but all of the metric ones topped out at 4 mm.

Here's a simple 5 mm one.

Moderately parametric model. I got lazy when it came to the handle, especially the fillets.

The zip-tie is recessed. The head sticks out a little bit, but it really doesn't bother me.
- head width is about 4.87 mm
- thickness: 1 mm

With the zip-tie, the hex key is very secure. I'd say it's necessary for use.

I used a pair of nail clippers to flush trim t