This is a themed tool holder to match the rest of the Better Ender 3 series of parts I've made.

I liked the original design for this tool holder, but if you didn't pull the tool out quite right, it would take the tool holder (and the rest of the tools) with it. I didn't want to risk dropping the tools onto the bed, so I made the tool holder drop into the top rail, then slide into the end as an endcap. Now it's much more solid.

I also mirrored the design and flipped it to fit between the Z-axis post and the top rail, so it's out of the way.