Robert Welch Signature V Knife Block set 7 PieceThis knife block comes complete with an integrated ceramic wheel knife sharpener, to keep blade edges honed and sharp. A magnetic locator in each slot draws the spine of the knife to the block, preventing damage to the cutting edge when inserting or removing the knives. The knife block is designed to hold 6 knives. It is recommended that after 12 24 months, depending on frequency of use, you change the ceramic sharpening wheel in the built in knife