Ball Bottom Mount Bracket LED-660 & 666. For JD tractors using a 1" ball mount bracket. Can not be used in the JD 8000 series grill, only LED-630 can be used for that application.
Solid Bottom Mount Bracket LED-660 & 666, for high vibration and JD 20/30 series tractors and 60/70 /"S" series combines, and many others using a 1 3/8" "U" clamp.