The handles that I have aren't an exact match for the F747. The handle on my F747A measures about 0.91" at the front square part and about 0.75" at the back round part, and is about 3.7" long. The SDD48, SDD412, and SDD416 screwdrivers have the same size handles.
The handles that I have are about 1.04" at the front and 0.85" at the back, and are about 3.7" long. The hole is 0.22" diameter. They are the same size as SDD2, SDDP31, or SDDP61. They don't have part numbers on them, they just say Snap-on and USA like the F747A, but the back says "Warning Not a prybar or chisel" and "Patent pend." The orange ones have black script and the red ones have silver.