At that point Otto invented the removable calk. The company began with two employees manufacturing the patented calk for horseshoes. In 1912 Otto build his first plant and began to manufacture horseshoes. Over the years the Diamond product line expanded to include a full line of farrier tools as well as many other hand tools and hand tool products. The horseshoe production process begins with the in-house manufacturing of the required tooling.
Steel is purchased from several certified steel vendors.
The round bars are then cut to the proper length for each product. Bars are heated to 2200 degrees and then pre-formed into a horseshoe shape before forging. The pre-formed bar is now placed between the dies in the Erie air hammers. The forger controls the blow intensity with a foot pedal. The forging is cut off the bar and the process begins again.