I purchased this on Yahoo Auctions. The handle is made of Tachi-gaki (ironwood). It's made in the style of a chisel for thrusting, but it seems better to cut the handle and use it as a mortise chisel. The length of each is about 270mm. Made by: Nagahiro, Koshu, Hiroichi, Hiroumi, and also Sekido, Tasai Keizaburo, and Tsunesaburo.