I ship a lot of things and nothing is more frustrating than the roll of tape falling off the spool or moving just enough to wrinkle the tape so I came up with this replacement spool that locks the roll of tape to the spool using a 3mm bolt.
There are two different versions that fit various tape dispensers.
A roll of tape is pressed onto spool and then locked in place by tighten the 3mm screw, to remove spent roll loosen screw and pull old roll off. Simple as that.... I've been using these for about a year and they work awesome.
Tape Gun Guard should be printed out of PETG for best results.