These are four ice axes, also known as "Ibo-ibo Haken," "Warthog," or "Warty." The manufacturers are Salewa, Cassin, Mochizuki (MacJapan), and unknown (glencoe Scotland). They are approximately 20 centimeters long, and there are four of them. Since they are longer than those currently sold, I think they will provide strong defensive power. When you can set them up, they are very reassuring, so you can charge ahead. As a standard disclaimer for climbing equipment, please use them at your own risk. I am also selling these on other sites and to acquaintances, so I apologize if they are sold and there is a discrepancy.