I would appreciate feedback (comments) concerning the designs I have created for these ceramic pocket knives. Obviously a niche market but I feel that the ceramic blades are particularly suited for small ceramic pocket knife application. The folding action protects the black ceramic blades from damage and these two sizes of ceramic pocket knives do, in my mind, cover the majority of requirements. The ability to retain sharpness means the ceramic pocket knife will be ready to cut whenever required! YES, you can improve the edge and maintain it using a 600 grit diamond hone and ultra fine silicone carbide wet/dry sanding paper. Please read the SHARPENING page.