Upgrades over original model:

• Relief Corner Cutouts - This allows the hex to be proper sized at either 6.45mm (snug) or 6.50mm (loose) vs the original model which is at a ridiculous 6.70mm. Why is the original model so much larger yet feels so much tighter? because its grabbing at the corners vs the walls which is not ideal.
• Magnet cut outs for a 6mm x 1.5mm magnet on the cap.

There are 2 version you can print:

Snug Fit - width of bit slot is 6.45mm, the bit can still easily be removed and is my preferred sizing

Loose fit - width of the bit slot is 6.50mm, you would print this if your printer is maybe printing a little on the big side

Print this version and the original and i guarantee (or your money back) that this version if far superior.