Spool Holder Lock

One of the problems I have encountered frequently while using my Creality Ender 3 Pro 3D printer was filament spool falling down from the backside of the printer while lifting or moving it for calibration or reparation purposes. With this spool holder lock modification, you won't be facing such issues anymore! Spool holder lock is designed to work with the original spool holder. After assembling the spool holder lock to the spool holder, it fits tightly. However, that should not be a problem, you don't need to remove the spool holder lock ever. Instead, you can remove the original spool holder from the other end to change the filament spool. Use of my spool holder lock and changing the spool by removing the spool holder from the other end is much more convenient especially if you are using your 3D printer inside an enclosure.