4mm hex bit driver handle

This is a handle that holds 4mm hex bits and offers more grip and torque. The shape is your standard no thrills hexagonal screwdriver handle design.

I love my bit driver kit from ifixit; it has a ton of weird types and I've had it for over 5 years and they have proven to be durable and robust. My only gripe with the kit is that it's great for precision work, but for more *intense* applications the provided driver proves slippery and unable to provide torque.

The kit comes with an adapter that is the basis of my design. It's a very snug fit, so that the adapter doesn't slip out. I've added a space in the handle to fit a small neodymium magnet (mine is ⌀6.3mm and 1.5mm tall), in case the handle wears a bit and the adapter starts to slip. In order to install it you will have to pause the print at about 25.5mm.