The plating of common nut products is 1 to 2 coats Even the nuts used by automobile manufacturers have a 2-3 layer coating. The thickness of the plating layer greatly affects the quality and durability of the nuts. It is a very important and cost effective part of the nut. Auto-Ace non-marking nut is coated with 4 layers of plating The plating layer is about 2.5 times thicker than other nut products! Four coats are the best of plating. Extreme quality and durability. The high quality that you can see is so good that you wont be able to go back after every use. Compatible models: Leaf, Juke, Notebook, Note Medalist, Cube, March, Elland, Serena, Rapesta, Wing Road, GT-R, Skyline, Fairlady Z, Murano, Xtrail, Duaris, Seema, Fuga, Tiana, Silfie, Latio, etc.