This Monument Three-legged radiator valve key is used for 1/2in, 3/4in and 1in radiator valves. It has 7,8 and 9mm square profiles. ...

Faithfull Long series L–shaped, double ended Star (Torx compatible) keys. Torx screws are now commonly found on automobiles, motorcycles, bicycle brake systems (disc brakes), hard disk drives, computer systems and consumer electronics.