The raked version is slanted for flagpoles that are mounted at an angle.  For example 38’ Commanders with the original ‘teardrop’ bow fixture have a raked pole hole.  Size 12 X18.  Grommet to Grommet measures 10.5 inches
Note to International Members: Due to postage increases we had to add a $10.00 surcharge, resulting in the price being $50.