Pilot Frixion writes smoothly just like a regular gel ink pen but allows you to erase like a pencil at any time. Unlimited do-overs allow you to write, erase, and re-write repeatedly without damaging your documents. FriXion's smooth, mistake-free writing benefits teachers, parents, and professionals alike. FriXion erasable gel ink pens are available in a variety of colorful inks and point sizes that are great for making lists and staying organized. Complete Sudoku and crossword puzzles without a mistake or a hole in the paper.