Precision Driver Adapter (4mm & 3.5mm)

myminifactory

I designed this precision bit driver adapter in Tinkercad to serve as an interface between my precision bits and power screwdriver, allowing me to seamlessly switch between my 4mm and 3.5mm bit sets. The interior hole of the adapter is tapered to securely accommodate both the shorter 4mm bits and the longer 3.5mm bits from my reversible screwdriver. I also chamfered the rear end and incorporated a hollow section along the neck, ensuring compatibility with driver extensions featuring ball bearing retainers.