FriXion Erasable Gel Ink Pens by Pilot Offer More Than a Pencil Ever Could. 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. The eraser tip won’t wear down or leave crumbs behind. With FriXion, no one will know it wasn’t perfect the first time.