Cutting PTFE with a craft knife almost always leaves a slight angle, and that angle becomes a gap where the tube meets the hotend. Filament oozes into the gap, cools, and you have a clog that looks like a hotend fault. This cutter holds the tube and takes it off square in one action, so it seats flush. It is a small tool for a narrow job, and it prevents a failure mode that is genuinely difficult to diagnose once you are looking at it from the other end.
Good for
- Square cuts on PTFE tube
- Preventing gaps at the hotend
- Bowden tube replacement
- Clean ends on push-fit couplers
