Check the listing for details. MATE .250 X .500. Condition: Used. Listed at 80.00 USD. The product is likely a metalworking tool or component that utilizes a Morse taper .259 X .500 design. This means that the tool or component has a cylindrical shape with a specific taper angle and size to fit into a matching taper sleeve. The tool or component is designed for precision and accuracy in metalworking and manufacturing processes, utilizing the CNC (Computer Numerical Control) technology.