The first responder for field repairs on all types of knife blades. It’s like having an entire sharpening kit right in your pocket - able to tackle regular or serrated blades, gut hooks, hunting, fishing, - just about any knife using one or all of the following elements: Tungsten Carbide: Just three or four strokes will restore your blade. Ceramic Sharpening Rods :Polish to a finished edge in three or four strokes. Serrated Knife Sharpener: Designed to get inside even the smallest serrations. Diamond Tapered Rod: For fast reconditioning and maintenance.