DeWalt "Two Bit Holder" (hex bit holder for DeWalt Impact Drivers and Drills)

I wanted a holder that would hold TWO bits on my DeWalt impact driver and drill, and found some good options on Thingiverse, but the ones I found used a friction fit to hold the bits, and I found that I was occasionally losing bits as they worked their way out of the holder). I copied the basic idea of one of the other holders, but ended up creating a new holder based on inserting magnets during the print. The bit holder channel is slightly oversized so that the bits go in and out easily, but a magnet at the bottom of the holder holds the bits securely. The holder attaches to the side of the driver using a M3x10mm screw (standard size for DeWalt belt clip - or you can just reuse the belt clip screw). This holder also allows you to set the driver down, even without a battery inserted, without the holder impacting how the drill sits. I built it so that it attaches to the right side of the driver, but if you prefer the left side, all you have to do is flip the model horizontally so it can be used on the left side.

To print this, I set a PAUSE at the top of the magnet height (you'll have to look at the build on your slicer - you will see a round hole that starts at 2mm from the base plate, and ends at 3.86mm from the base plate). So set your pause at about 3.86mm. When the print pauses, I simply insert 2 magnets and resume. This design is based on an 8 mm diameter magnet that is 1.86 mm tall (found on Amazon for cheap).

Some tips:
If your print head is made of steel or has steel parts near the nozzle, the magnet might suck up to the print head - which would ruin your print. In that case, you might need to add a little super glue to the bottom of the magnet to keep it attached to the print. In my case, I didn't need to do that - my print head is aluminum and brass, so no issues.

I typically place the magnets on the build plate at the start of the print. This heats up the magnets to the build plate temperature - so when you insert it into the print, the magnets are already slightly heated. Otherwise, if the magnets are inserted cold, then the first layer that prints on top of the magnets might cool too quickly.

Make sure when you resume that the print temperature resumes where it was before the pause.

This holder is printed vertically and did not require any supports. This allows you to insert the magnets early in the build, so you can walk away once the print has resumed.