Pens are double sided, accepting a tip on either end. Tips come in sizes of 1 (single), 3, 6, and 9 based on how many diamonds they will pick up at once. In addition, we have straightener/correction tips, which are flat tips used to nudge your diamonds into place and straighten rows; we currently have straighteners in small and medium sizes.
All the tips are interchangeable, though single tips are just slightly thicker than all the others. If your tip or straightener is wobbly or won’t stay secure in your pen, you can add a few drops of HOT GLUE (not super glue) into the end of the pen to secure the tip. If you want to change out this tip in the future, you will be able to remove it with a little bit of elbow grease and the assistance of some pliers.