The Work Sharp Guided Field Sharpener 2.2.1. is a compact knife sharpener designed specifically for field use by sportsmen. Built in sharpening guides ensure a consistent bevel angle across the entire length of any blade. 5 abrasive steps provide the complete sharpening solution (2 diamond plates, 2 ceramic rods, 1 leather strop). All elements are self contained and require no set or assembly in the field.