Well I purchased a boxlot full of camera's and accessories and this box of Leica items was in there. Not being a photography professional, I have no idea what this item is used for. I do know it is in very good condition and includes four matching rods. I believe this set of Leica camera accessories is from the the 1930's to 1940's as the camera I purchased from this boxlot is from the same period. This box measures approximately 12" by 3" by 2" inches. It is alos in good condition and has no open or weak corners. The buyer pays 9.98 for US Mail shipping as these accessories are heavy. Thank you for your interest in these vintage Leica camera accessories, ww2dogs.Check out my other items!