We know all our customers are perfect, but should you make a mistake (and of course you wouldn't) Kaweco has just the thing for you: the Sketch Up Eraser! This should be perfect for those times one's hand can't keep up with all the creative genius coming from one's mind.
Sketch Up Eraser is manufactured from solid metal in raw brass finish. 
Simply press the button at the end of Kaweco's Sketch Up to open the jaws of the clutch mechanism gripping the eraser cord to slide the cord in or out of the housing. Release when the cord has slid out to the desired length. 
One stick of 5.6mm Kaweco eraser cord is included. Replacement eraser cords sold separately.