With 75 Blades, This Knife Was the Ultimate Multi Tool of 1851 - The Norfolk Knife was named for Norfolk Street, the location of the Rodgers factory in Sheffield. It's both a tool and a work of art. The knife has 75 blades and measures 22 inches thick and 34 inches long. There are etchings of Queen Victoria and the White House on it. It's now on display at Cutlers' Hall in Sheffield.