These are terrific for mixed media work - they are large enough to be seen after incorporating into work and light enough not to be a problem with adhesion.
They also blend very well with gears and sprockets by Tim Holtz - as well as "real" watch gears and parts.
It should also be noted they are very reasonably priced.
These are a great alternative to found gears. They are uniform in size; making them great for jewelry. They are great quality, and come with a variety of sizes and metals. They are just really fun to use!