Was fully satisfied with the pencil until I had to refill mines. I thought okay easily screw so how well does it in a Kulli. No sooner said than done, but after the thread has been Loosened the remaining small piece was pretty stiff. With a jerk you go but then from. The complete Radiergummieinheit this falls at the back. After replenish everything bolted together / plugged and now no longer mine comes out front when I plan pressing back! the click is gone. So a scrap. Faber Castell I am :( because accustomed else'm going to test the next competition.