The Worksharp 2.2.1 Guided Field Sharpener 09DX100 is a compact sharpener designed specifically for use in the field. Five abrasive steps provide the complete sharpening solution. The built in angle guides on the Worksharp 221 GFS Knife Sharpener ensure a consistent bevel angle across the entire edge of a blade. All elements are self contained and require no set-up or assembly in the field. The Worksharp 221 Guided Field Knife Sharpener has been designed to work with plain and serrated blades, scissors, fish hooks, garden tools, broadheads, axes, machetes, and so much more! Also features a lanyard hole for easy carry.