Otter Messer UK legal carry folding pocket knives are hand made in Solingen, Germany, with carbon steel or stainless blades. C75 carbon steel is unalloyed steel with a fine molecular structure and gives an extremely sharp, long lasting cutting edge. Note: carbon steel knives need to be cleaned and oiled after use to prevent corrosion. Surface corrosion can be removed with fine emery cloth. 4034 Stainless steel is an alloy containing more than 11% chromium, which prevents blade discolouration, the molecular structure is coarser than carbon steel. All prices shown include standard UK delivery.