Spyderco Slip Stone with Pouch, 2 x 4 -Inch Made using the highest quality materials Tested for quality and durability The most trusted name in you cutlery needs Slip-shape (teardrop) ceramic stone effectively sharpens concave edges and tools with sophisticated edge shapes Fine grit is perfect for maintaining an edge or for professional-grade finishing and polishing of a sharpened edge Includes protective leather pouch Easily cleaned with ordinary kitchen cleanser and a plastic scouring pad Made in USA