Twin-Slice Cutting Board with Knife Sharpener , Comfortable knife sharpener ready to use , Knife sharpener made of ceramic suitable for most stainless steel knives* , Knife friendly cutting surface , With anti-slip corners for secure cutting and chopping , Easy to clean: dishwasher safe *Not suitable for jagged or cermatic blades Manufacturer item number: JJ60028 , Pack contains:1 Joseph Joseph Slice & Sharpen Big, Black, Cutting Board Set, Chopping Board, Knife Sharpener, JJ60028