nice caps, good, but not excellent injection mold quality. Nonetheless, I'm happy with the product!
They fit my (blue) self-locking switches perfectly. They are 'stuck' enough so you don't have to glue them on a breadboard. But I would glue them in a (finished) project. They are long enough (ca 1 cm) to go through the lid of any container that's housing your project. Great product! They don't fit the normal tactile push buttons since the caps have a rectangular opening! As in the description.