Attention must think about buying at the same time staple refills, none is supplied with. Here are the references to procure: 23/8, 23/10 or 23/12 (up to 100 sheets).
What is not seen in the picture, it is the size of the stapler, it is almost 30 cm long. A rap for stapling, and voila (a small strip allows to calibrate the stack of papers in the right place before stapling).