This wrench is for all SZ cars (Spirit/Spur) that have an adapter on the top of the brake pump that looks like the one in the picture. This wrench is CNC water-jet cut from 5/16" steel plate and gold zinc plated. It is precisely cut and you may have difficulty if your adapter has been mangled with Vise-Grips or a chisel. The body of the pump can be held with a Brake Pump Socket (item BTW001) and the socket hex can be held in a vise as shown in the last picture. This will allow plenty of leverage to break the adapter free.  The nut under the adapter is a lock nut. Make sure to break it free first.