The Opinel No. 9 OP01083 is a very large knife with a full-size 3.5 in. blade. The blade is made from 12C27 Sandvik stainless steel, which will not rust, however try to avoid leaving your Opinel knife in damp environments for too long and dry the blade after each use. The beechwood handle is ultra resistant and comfortably contoured to fit the hand.