The tool is designed to fit the sleeve properly so it can be turned out without marking, denting, or damaging the sleeve or the frame.
I presently have a revolver with a damaged sleeve, and trust me, without using the correct tools to remove the sleeve there is no way on this earth I'd attempt to remove it without the proper tools. It will eventually go back to S&W's Service Center for replacement. Nobody here in Knoxville wants to mess with it.
Removing and/or replacing the sleeve and/or barrel is better left up to the pros, because if the parts are not reassembled to spec, the gun becomes dangerous, especially if the cylinder gap is set incorrectly.