a tool including a front housing and an expander head ring that is readily attachable and detachable from the front housing . the front housing may be coupled to the tool body , or can be integral with the tool body . the front housing may have a mating end that has one or more locking tabs that are configured to be engaged by the expander head ring . the expander head ring may carry one or more functional elements such as a die set that may be expanded by insertion of an expander extending from the tool such as by manual actuation of the tool . a plurality of expander head rings , each with a different size die set , can be alternatively attached to the front housing , depending on the desired extent of expanding of the pipe or the like with the tool .