The British government, for example, is considering new legislation on carrying blades in public. The Swiss Army Knife has its roots in 1880s Germany. Then the Swiss Karl Elsener took production ...

A man drove through the barriers of the St Omer Barracks in Aldershot yesterday and damaged a vehicle with a knife, police said - a police bomb squad was rushed to the scene ...

That seems to be the question British designer Mike Read asked himself ... This mechanism is commonly found in Swiss Army Knives, but it has been a crux of the knife world for centuries.