Refill Filament Spool Lock – Triple-Start Thread

This is a Filament Refill Spool Lock designed for maximum stability and reliability. The model uses a triple-start thread, making it far more secure than classic twist-lock or snap systems. The outer shape is inspired by a five-spoke wheel, offering excellent grip and high mechanical strength while keeping filament usage low. Once tightened, the lock does not loosen or unlock accidentally, even during long prints or fast spool movement. A robust, clean, and functional solution for refill filaments.