Anyone ever heard of the Japanese writing instrument brand OHTO? They market mostly to Japan customers. I've never seen them for sale in the USA. I recently stumbled across a ballpoint and mechanical pencil set made of an aluminum alloy. Very slim, as aptly named "Mine Slim." And very light. But the machining and fitment is excellent. The mechanical pencil can post and still perform lead advance action. The "ceramic ballpoint" acts like a roller ball. Nice ink flow with little pressure. I got this set as part of a pen lot purchase... with no interest in these at all. I was going to give them away, but after trying them out, I changed my mind!