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 of this product is so easy to see that it will not go back after you use it. OEM light car with Daihatsu / Pixis Epoch / Pixis Space / Pixis Truck / Pixis Van Taper Seat / HEX (Wrench Size) 0.9 inches (21 mm) / Total Height 0.9 inches (22 mm) / (B) Projection Height when installed / Wheel contact shape / Taper Seat 60° ◆ Compatible Bolt Standard M12 pitch 1.5 (B) Height to the top.