The PROMASTER 3545 Aluminum Extension & Macro Legs work with XC-M 522 tripods. After removing all 3 of the XC-M 522's legs these extensions attach in their place. Now you have a choice. Either reattach the legs to these extensions and you get a very stable tripod with 6" more height, OR attach the 3 soft feet (included) to the extensions thereby converting your tripod into a lightweight, super-strong macro tripod.