The Worther Spiral adapts the hexagonal shape of their flagship Short with a fun twist. The pencil has a click top button to propel the lead, and is fitted with a fine 0.5mm lead for more detailed work. A handy eraser is fitted under the cap. For refills, choose the Lamy or Parker 0.5mm lead refills. The Spiral ballpoint pen features a click button and takes standard international refills.