The Redi-Edge® Multi Tool Sharpener REOMT203 combines two sharpeners in one. Use the Duromite™ inserts on your straight edge knives, and the ceramitized honing rod on your serrated knives. Both will leave your knives sharp, intact, and ready to go to work, all with the use of just one handy tool. Designed to sharpen both serrated and straight-edged knives. Redi-Edge® Multi Tool Sharpeners are produced from military-grade aluminum for extreme durability, long life, and lightweight. Design features include a proprietary corrosion-resistant finish and a diamond coating honing rod inserted into the body of the sharpener.The DuromiteTM inserts are harder than any knife blade; and factory pre-set to the inclusive angle of 40°. The 40° inclusive angle maintains a consistent 20° double cutting edge on most knives. The Redi-Edge® Multi Tool Knife Sharpener comes with a ballistic black sheath. Sharpens, polishes & hones.