Abstract: A compound tool for installation of a cable tie band. The elongated tool has a transversely disposed open-ended, rectangular slot that broadly approximates the tie band in cross-section and through which the free end of a loosely assembled tie band is threaded, firmly tensioned and finger clamped on the tool handle, the tool bottom being fulcrumed on the band at the tie head. The tool is then rotated to tighten the band and secure the bundle. A cutter blade, incorporated in the tool structure, is so pivotally mounted and configured that in the shearing of the excess of tie band, the blade initiates shearing at the outside edge of the band-slot assembly and continuously during shearing exerts only a clamping force which influences the tie band into the slot.