This is BMW parts item CTA-2491, described as CTA Tools Lock Ring Removal/Installation Tool for Fuel Level Sensor, that you can buy at the best price with fast shipping.
Lisle Fuel Tank Lock Ring Tool LIS63000 - Advance Auto Parts
Fuel Service, Specialty Tools, Tools & Garage, Autobarn Category
XC90 Fuel Pump Replacement Tutorial - Volvo Forums - Volvo Enthusiasts Forum
Performance Tool Fuel LockRing Tool W80699 - Advance Auto Parts
2006-2009 Mercedes E350 Fuel Pump Removal Tool - Baum Tools 203-0107 -
Large adjustment range,suitable for different oil pump glands. Four-sided rounded corners, not easy to hurt your hands when operating with both hands.
Fuel Pump Removal Tool,Fuel Pump Lock Ring Tool, Fuel Pump Lid Tank Cover Wrench, Fuel Tank Lid Cover Remove Spanner, 3/8 to 1/2 Universal Wrench
Universal Fuel Pump Removal Tool, Adjustable Fuel Pump Lock Ring Tool, Fuel Tank Repair Kit, 5.31'' to 7.17'' Lock Ring Spanner - AliExpress
TOOL, Fuel Tank Sending Unit Lock Ring, allows for easy installation and removal of sending unit lock ring (npd p/n C-3107-20, 1 29/32 inch i.d.) - #992-1 - National Parts Depot
Rental Tools EverTough Hub Remover and Installer Kit 67213
