Prester John
I like good made ones unfortunately this one isn't mine. Just a pic I grabbed. I'm thinking of all the characters Saruman would be the only one to carry a folder as a WEAPON. My reasoning is this, for Aragon, Legolas and Boromir would have ranged weapons I.e. bows. Throwing axes for Gimli. That would be an analogue to a long gun for us. Their swords/axes are secondary weapons ( as they were historically, for example a knights primary would have been a lance) which would be likened to a handgun for us. Sheath/belt knives and pocket knives could be pressed into action, but like 99% of us today, are used for mundane day to day tasks. But Saruman being a Wizard his power is his weapon. A knife would be unexpected attack from such a person. But due to his devious nature would be a tactic used by him I think. Thus a concealed knife would BE a weapon for him. For someone with a mechanical inclined mind,I think he'd enjoy the action on a well made stiletto switch blade. I can just see him with a pocket in the sleeve of his robe in which to secret it.