Gridfinity 4mm driver bit holder. This model is a 2X1 Gridfinity base, that holds 30 bits, in a 6X5 bit configuration. I designed this to be as compact as possible, cramming as many bits into a 2X1 square that I could. Bits lay at a slight angle for a nice presentation, and to help keep them in place, yet easy to access. Though compact, grabbing a bit I find still very easy. I simply get part of my finger under the tip of the bit, tip it upwards slightly, and then pinch it and slide it out.

Features standard Gridfinity layout, with 6mm magnet holes. No screw holes though.

This wasn't designed for any specific kit of bits, though it will hold any standard 4mm driver bit just fine.

I printed 0.2mm layer height, Gridfinity side down, no support needed.

Looking to store those big hex nut drivers too? Check out my other bit holder with larger bit storage: https://makerworld.com/en/models/91493