This Okada chisel bit appears to be brand new with no previous use. This ram bit measures 51-1/2" in length with respective top and bottom shaft diameters of 4.750" and 5.375". The side of this chisel bit is stamped with the following information: Made in Japan / S-002351 / UB-17. This bit has a listed weight of 268 pounds. FOB shipping point: Bucyrus, Ohio.