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 moreintense 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.

Print instructions

Rafts: No
Supports: No
Resolution: 0.2mm
Infill: 20%

Notes:

• 20% infill might be on the lighter side, but it's just a prototype. I'll report back after I've given it some use. I printed with 4 perimeters, as these will be doing most of the work.
• As mentioned, introduce a pause with your slicer at about 25.5mm if you want to add the magnet. That's around layer 128 when sliced at 0.2mm. This is tricky, as the magnet will want to stick to the brass nozzle. A drop of superglue underneath it will help.