4mm x 1/4inch bit adapter (for using 4mm bits)

thingiverse

If Thingiverse is as slow for you as it is for me, consider looking for your 3D parts at Cults 3D: https://cults3d.com/en/users/WrenchToDrive/creations Update: Six weeks of heavy use have left this little beauty surprisingly intact. I'm actually really impressed - I thought it would strip and/or crumble easily under the stress, but so far, so good. Two other bits haven't lasted as long. This is an adapter for using 4mm hex bits with a 1/4 inch tool. A thin piece of plastic inserted into the slot in the 1/4 inch end provides a snugger fit. I've been pleasantly surprised by its performance - it works way better than expected, and it hasn't broken stupidly easily. The bit goes in fairly smoothly but often gets tight when you apply torque, so I usually have to pull it out with pliers. After daily use for a week, it still hasn't broken, which earns it decent marks. Printed in PLA with 1.2mm walls, 85% infill and 5 degrees hotter than usual for extra strength. Use at your own risk. Wrench or drive - which comes first?