This winch handle is designed to be used with "M" winches to raise and lower the flag.
For a M Winch on diameter poles 6" - 14"
The end that goes into the "M" winch is approx. 1/2" round. The only difference between this handle and the EF360045 is the thickness on the actual bar. This handle would probably be better suited for use on larger flags such as 6'x10' and larger since it is a little more substantial.