Can you think of any restricted-use items that do not degrade with use, so that the cost/trouble of replacement is not an issue? I don't think something like C

Can you think of any restricted-use items that do not degrade with use, so that the cost/trouble of replacement is not an issue? I don't think something like Christmas decorations would qualify. I don't use a hammer when I'm not pounding something and I don't use decorations when I'm not celebrating that holiday. "Restricted" would mean that you don't use it even in an appropriate situation.