Professional looking rivets are perfect for purses backpacks and handbags! These rivets are durable and look great from both sides. They are even strong enough to stay attached to leather!  All of the components to create twelve rivets are included. It is important to learn how to choose the correct size how to properly install rivets and about the tools needed for proper installation. They are very easy to attach. Tools are not included. Large Size: Cap 5/16in (8mm) Post 1/2in (13mm) Base 5/16in (8mm). 1 Package of 24.