Click! The first modular system that cleverly links two pens together - use a single pen or connect two favorite colors together. This four pen set comes with a fold-out storage case that fits easily into a pocket and folds out to work as a handy holder on a desk. The chisel tip offers two highlighting widths - 1mm for underlining and 4mm to highlight a line of text. The pen body has an ergonomic three edge design, rubberized barrel, and is constructed from 88% bio-based plastic. Cap-off ink doe