All mounting hardware is added at the factory by hand. There are no specific locations for hardware to be placed in the back of the letter and therefore the locations of studs or combo/combination all type mounts will likely vary from letter to letter, EVEN WHEN THOSE LETTERS ARE OTHERWISE IDENTICLE !
When you order more than one set of identical letters for a project, YOU WILL NEED AN ADDITIONAL MOUNTING TEMPLATE!
When you receive your letters you will find a tag in the back of each letter that specifies to which position and which mounting pattern it belongs. It is vitally important that you match the letters to the mounting pattern BEFORE beginning installation.