Adjustable speed knob provides precise, smooth control and reduces unintended drag, adapting to printer speeds for broader application versatility. Magnetic suction structure with a patented design enables quick installation and removal without a tube core, boosting convenience and efficiency. Durable construction uses 304 stainless steel and 6061 aviation aluminum for a sturdy, longlasting, portable unit that is easy to handle. Silent operation keeps the workspace quiet, supporting a focused and productive environment. Use scenarios In a 3D printing workflow, use the adjustable speed knob to finetune printer speeds for precise results and to prevent drag on moving parts during long prints. In prototyping and testing, take advantage of the magnetic suction structure for fast, tubecore installation and removal, speeding up iterative changes. In classrooms, labs, or workshops, rely on the silent operation to maintain a quiet environment while demonstrations or experiments run.