Cooks Standard Professional Ceramic Rod Knife Sharpening Steel, 12-Inch/30cm Made of high quality ceramic alumina that is harder than regular steel and prevents rusting Rod length measure 12-inch/30cm and 5/8 inch diameter; Long enough for professional use Handle is designed for safety and comfortable to hold with a stainless steel guard cap and ring Ceramic is hard, but not break resistant; Please do not drop on ground or hit on hard surface Wash and brush after use with regular kitchen detergent/abrasive cleanser and sponge