Instead of paying $35 to $50 for a special flare socket, I have made my own in about 15 minutes.
Using a 17 mm 3/8 drive deep socket bought for $5 at Northern
Tools and using painters tape to mark the area to be ground off, which I did with a 4.5 inch angle grinder.
Keep water on hand to cool the socket in between grinding to prevent bluing and losing its temper!!
It works perfectly. A damn sight easier then trying to add the picture for all of you to see my handiwork.