Screw Bit Holder
thingiverse
Need a straightforward tool to securely grip your screwdriver bits? These are engineered to hold 0.25-inch wide hex-drive screws or drill bits snugly. For extra peace of mind, tiny magnets can be bonded into the bottom of the holes. Use 0.25-inch diameter x 0.0625-inch thick magnets held firmly in place with some medium cyanoacrylate glue.
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