2.75 in. x 1 in. Diamond MiniSharp sharpener in black, extra coarse. Perfect for fly fishing vests or tackle boxes, this convenient tool hones a sharp point on hooks and can restore a razor edge on a knife with just a few strokes. Opens to 5.63 in.Perfect for fly fishing vests or tackle boxes, this convenient tool hones a sharp point on hooks and can restore a razor edge on a knife with just a few strokes.