This is an antique McCormick Deering sickle blade grinder. You clamp the sickle bar with sickle blades still attached into the grinder. It grinds one side of two sickles simaltainiously. That is why the wheel is angled. I have not used it and would consider it a display piece although everything works well and it seems pretty tight. It has no welds or repairs. T is one pin that fell out an got lost. It has been replaced with a bolt. A replacement pin should be a hardware store item.