Crocker Style Graver Sharpener Engraver Tool Holder Wire Guillotine Oilstone Edge Sharpener Measures 2-1/8" x 1-3/8" Capable of cutting multiple wires at the same time; ranging from 0.0 mm to 1.50 mm AWG 40 to 16 Gauge It is designed to keep a keen edge on your graver. Cuts wire without pinching The graver is placed in either of the two angled openings, and roller over a flat oilstone to sharpen (not included)