The eye is installed through our plastic backing block bedded in a mixture of epoxy resin, colloidal silica and micro fibers to spread the load throughout the area. The epoxy kit listed below has the resin and fillers needed for a proper installation.
The center-to-center distance between the legs of the bolt is 1-3/8".
Caution: Never moor your boat from the trailer bow eye. It is intended to take a load from the trailer winch, directly forward of the boat. A boat "sailing on its anchor" will exert a substantial side load on the bow eye. That side load will bend the eye and probably damage the fiberglass and gel coat.