Ceramic provides a fine edge and is durable. Good for maintaining sharpness but not for very dull blades. Diamond is extremely effective for sharpening and can handle very dull blades. Steel is ideal for honing and realigning edges.
Coarse grit is suitable for repairing and reshaping very dull or damaged blades. Medium grit is good for regular sharpening and edge maintenance. Fine grit is deal for honing and polishing the blade to a sharp finish.
Choose a sharpener that is easy to clean and maintain. Some sharpeners may require more frequent cleaning, especially those with abrasive surfaces.
Consider if the sharpener allows for replacement of abrasive components or other parts.
Ensure the sharpener has a non-slip base or handle to prevent it from moving during use.
Look for sharpeners with safety guards to protect your fingers from the blade.