Select your preferred hole type below:
Quickmount, Internally Geared, CB thru holes inner & outer rings for #4 size screw
Quickmount, Internally-Geared, CB thru holes for #4 size screw inner & #6-32 UNC outer
Quickmount, Internally-Geared, #6-32 UNC inner ring & CB thru holes outer ring
Quickmount, Internally-Geared, #6-32 UNC inner & outer rings