You're looking at a brand new Seiwa Edge Beveller No.1. This high precision tool has a precision cutting edge and is excellent for smoothing the edge of your leather.
Ergonomically curved to maximise comfort and efficiency, this tool is made from steel, not cast metals, it will last years! Best when used with leather 1.0mm to 2.0mm thick. This high quality tool is an excellent addition to your leather workshop.
Please note, this tool is not recommended for very soft leather, especially very soft chrome tanned leather.