By constructing clamping jaws, which are employed for applying the desired force to the rings to be crimped, and mounting the clamping jaws in a plane which is substantially perpendicular to the plane in which the handle members are positioned or constructing the clamping jaws for arcuate movement relative to the handle members, an easily employed, force generating, crimping tool assembly is achieved wherein the clamping jaws cooperatively associated with the handle members are positioned at a fixed angle relative to the handle members, or are constructed for being arcuately pivotable relative to the handle members. The crimping tool assembly is able to provide the desired crimping forces to rings mounted in areas in which access is virtually impossible to achieve using prior art tool assemblies. Alternatively, if desired, the clamping jaws may be mounted to the handle members at any desired fixed angle.