I do actually wear a kilt more often than not, when not at work (due to safety program requiring trousers); and typically carry a sgian dubh for aesthetics as well as for practicality. Recently I purchased a set containing two cased knives, one of total overall length of about 7.5" and the other about 10". The shorter of the two is near the length of the one that I am accustomed to carrying.

So, my question - what is the longer one for? Does anyone carry more than one at a time? If so, where?