Costco Sale – Farberware Self-Sharpening Knife Block Set by Rhonda May 8, 2021 8/16/17. A unique feature is the built-in ceramic knife sharpeners that automatically sharpen knives with every use. Costco has the Farberware Platinum Self-Sharpening Forged Japanese Steel Cutlery Set on sale for … 0 FacebookTwitterPinterestEmail