In July 1st 1868, John C. Klein and Frederick C. Klein, brothers engaged in the manufacture of coal picks, hand shovels, pokers and other small iron items since 1856, took as a third partner Edward P. Logan and continued business under the firm name of Klein, Logan & Co. Because the business was located in Birmingham, at that time a suburb but now that part of Pittsburgh lying along the south bank of the Monongahela River. Pittsburgh was not only a railroad center but also the outlet of the product of the western Pennsylvania coal fields, and picks soon became a major item of the new company's products. John C. Klein, the older of the brothers, had an active, inventive mind which he directed to the then most difficult problem in the manufacture of picks— the eye. In 1874 he was granted a patent on a machine for the forging of pick eyes which, while crude and complicated if judged by modern presses, was a definite step forward.

This Adze/Pick/Axe Head measures 13 3/4" long in total length.  

The axe portion is 2 5/8" tall x 4 1/2"  with the adze being 3 3/4" wide at its widest point and 6" long.  The handle insert is approximately 1 3/4" x 2 3/4"