A collection of devices intended to be used to implant a vascular anastomosis coupler [not included] to join vascular (including microvascular) structures by the coupling of two ring-shaped components. It consists of two or more items typically amongst: a coupling approximator for holding the rings of the coupler during approximation, a dedicated forceps/everter for placing the ends of the blood vessel over the pins of the coupler, and a vessel diameter guide (sizer). This is a single-use device.