6599 Fuel Tank Ring Tool Fuel Pump Senders Removal Install Tools for Chrsyler Dodge Ford Chevy BMW Benz Volvo Jeep Nissan GM. Model OTC 6599. Model : OTC 6599. Intended Use: Easily removes and installs lock ring on the fuel tank when servicing the fuel pump or fuel sending unit (use with a 1/2" drive ratchet or breaker bar).