When we want to let everyone know what our cufflinks are made of, we engrave it on our cufflinks. Well, at least this pair has got the word "Titanium" engraved on it. If you think that's a bit tacky, don't worry because it's written on the part that goes inside the cuffs. The outer part has a titanium barrel with rubber rings around it. It has a dimension of 3/4" x 5/16" so it shouldn't be a problem if you don't want too much attention with it. Although we cannot assure you that you won't get compliments when you wear it.
These are the coolest cufflinks I have ever seen, since they are made of titanium with an awesome application of the rubber.