This quality 5.6mm mini pen insert coverts the workshop / sketch pencil into a ballpoint pen. It is also the refill for the ultra comfy pen.
This refill is easy to replace; simply push the easy release mechanism button on the back of the pen/pencil to release the collet jaws, slide out the pencil lead or used pen refill and insert a new mini-pen refill. Take your finger off the release mechanism and the collet jaws will close and secure your pen refill ready to write.
This listing is for one mini-pen refill.