The first responder to all field repairs, the Blademedic 4-in-1 sharpener is must have for super quick sharpening on the go. The Blademedic Knife Sharpener is the first responder for field repairs on all types of knife blades. It’s like having an entire knife sharpening system 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 CarbideJust three or four strokes will restore your blade.Ceramic Sharpening RodsPolish to a finished edge in three or four strokes.Serrated Knife SharpenerDesigned to get inside even the smallest serrations.Diamond Tapered RodFor fast reconditioning and maintenance. Sharpening angles are pre-set at 22.5º to achieve a 45º inclusive angle. Diamond- 600 gritCeramic- 1000 grit