Drill chuck adapter

Adapts drills with 3/8" (10mm) chucks to use 1/2" (13mm) drill bits.
Works best with 3 jaws chucks.

Print at 100% infill with toughest material you have; Tighten with up to M4 screw; Use at your own risk - this can break!

This saved me from replacing my drill when I needed to make just one hole with a specialized bit, so I thought I'd try to participate in the “replacement parts” contest.