I checked with the company to make sure that this handle would be compatible with my Rex Envoy razor head. Executive Shaving very promptly responded to my query confirming its compatibility. The handle does fit the screw thread but the opening of the back plate of the Rex Envoy is much wider and consequently, the handle will not secure the top and back plates together. I feel rather flat and let down. Over many years, I’ve relied on the good advice of the company and perhaps the next generation is not yet ready to take over the management of the company? The handle is well manufactured, of a good weight and length. It’s a shame that it does not fit my razor head.