The Comprehensive Guide to Comparing 3D Filament
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PTFE can be very difficult to cut free hand - using knives or razors can deform or crush the tubing, and it can be extremely difficult to get the end of the tube straight and square - which is important for a good seal with the top of the nozzle of the printer. This PTFE cutter makes cutting square, straight ends easy, and won't collapse or deform the tube.