Knife Pen Ink Refills from United Cutlery
Knife Pen Ink RefillsYou can continue to use your knife pen as a pen with these ball point refills. 5 refills per unit. Black ink
These ink refills will also fit the Mace Pepper Spray pen, but require you trim about 5/8 inch from the plastic end to allow th pen to retract normally. Discontinued
Note, you could probably use many of the varieties of refills available for ink pens and cut some of the tube off to fit.
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