While I would have preferred a smooth finish, this product fits perfectly as described. Previously, I attempted to use HD French trim ring but could not tighten enough to close the gap, a common complaint. This is manufactured to screw directly onto the actualy headlight ring once the stock ring is removed. I also got the matching 4 1/2 trim rings for the smaller lights. Those worked awesome too with no gap at bottom. Kuryakyn should offer a smooth finish, but the ribbed works for me.