Lyra 4707100 chalk holder for round and square chalks with 10 mm diameter push-button mechanism, black (Office supplies & stationery)
At first I was a bit shocked. The chalk holder was very easy, and looked like very cheap plastic. In fact, the thin hold Stiftchen a bit bent (at least in my version), and it takes a bit until you hineingefriemelt the chalk. Through the ease of chalk