Edding Retract 12 Retractable Whiteboard Marker Pens - Edding 4-12-4, The Edding Retract 12 is a Retractable Whiteboard Marker Pen with a push-button mechanism for single-handed operation. The tip is revealed by simply pressing the push-button at the end of the marker and retracted by pressing the catch in the clip or by raising the clip slightly. A retractable seal system prevents the marker from drying out when the tip is retracted. Edding 4-12-4 Retract 12 Whiteboard Marker Assorted 4pk