1/4 inch to 4mm hex bit adapter

thingiverse

I purchased a precision screwdriver designed for watches and eyeglasses; however, it only accommodated 4mm-sized bits, rendering it unusable for larger screws since none of my standard 1/4 inch bits would fit in it. I endeavored to find an adapter online but was unsuccessful. To overcome this limitation, I created a custom adapter using Fusion 360, allowing users to employ standard 1/4 inch-sized bits with the 4mm precision screwdriver. Simply print the adapter and insert a magnet inside to secure the bits in place.