What will this chisel be suitable for, i have a TE500/700?

Any of the below should fit your machine as it has an SDS Max fitting. https://www.lsengineers.co.uk/catalog/product/view/id/7331 https://www.lsengineers.co.uk/catalog/product/view/id/7332 https://www.lsengineers.co.uk/catalog/product/view/id/7333 https://www.lsengineers.co.uk/catalog/product/view/id/7334 https://www.lsengineers.co.uk/catalog/product/view/id/57183