This model is to carry a Topeak Hexus X21 Multitool in a housing that can be attached to a standard M5 bidon insert mount on a bike frame. It has a single attachement screw and can be fitted under the top tube as I have on my Canyon Spectral.It can also be fitted at the seat tube or the downtube where the frame mounts are.I made it open so water doesn't collect in it which can lead to the tool rusting.I used an O ring that is about 50mm diameter and about 2.2mm thick to secure the multitool in the holder.

I printed it with PETG HF on my Bambu P1S.

As shown on my Instagram @Luescher_teknik