These Alloy tips takes the place of the plastic tips that come with your pens. These tips will hold up longer and aren’t as quick to wear out or break as other tips would, however, they are not completely indestructible.
To replace the tip of your favorite pen:
Pull out the tip (you may need some needle nose plyers) & replace with the Alloy tip.
*In the event your pen has a wider hole, place some washi tape or plumbers tape around the end that is inserted into the pen)