Retractable permanent marker without cap for one-handed use, for marking and writing on nearly all materials such as paper, cardboard, metal, glass, plastic, and smooth wood. The bullet tip has a line width of 1.5 to 3mm. The permanent marker has no cap, simply press the button to extend and retract the tip. The sealing technology prevents the marker from drying out when the tip is retracted. Water and abrasion resistant on almost all surfaces. The product is refillable with edding RMTK 25 refill ink. The ink has a low odor and does not contain toluene/xylene.